Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links, observed 2026-08-06T15:45:56.281089Z
Paper Citation Record · LEDGER
As of 14 August 2026, this Paper Citation Record lists 70 of 70 outbound references and 0 inbound Pith citation observations for arXiv:2507.15052.
A citation records a reference. It does not transfer a finding from one paper to another.
Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links, observed 2026-08-06T15:45:56.281089Z
One-hop event checks from named stored sources.
Source: scholarly_work_events, retraction_status_cache, observed 2026-08-14T06:32:32.682623+00:00
Pith citing papers itemized under the disclosed page cap.
Source: paper_references, paper_reference_links
A source-named dated measurement, never combined with another source.
Source: cited_works
70 of 70 outbound references displayed
External citation measurements
No source-named external measurement is stored.
Observation bc77539b-bf60-4644-b49e-3df81a1308ff · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 1
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 53ce85e9-3958-4fc7-be4e-84d749b4f060 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb MacDonald, Thermoelectricity: an introduction to the principles, Courier Corporation, 2006
Reference 2
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 89c0c11d-f316-4869-9515-aff3660b196e · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 3
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation a1b4b4c6-85df-4d49-870c-ef6b578e368f · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 4
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 64438ad6-ca0f-4732-97af-bae020a565ab · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Joshi, D.P
Reference 5
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 5d7261b0-8f4a-4040-934b-e5fb5a711cdb · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Kawaharada, K
Reference 6
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation b4444a76-67f6-4cac-969e-00cccbe9d7bd · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 7
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation c77a82e4-2775-4574-b90a-f470a088af79 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 8
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 5d66c209-f349-495b-a288-c76c142471f6 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 9
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 416b8108-739b-48d7-8487-ef7ae134c046 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Shutoh, S
Reference 10
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation ec553d04-bed4-4911-bb8f-a5802dc2278a · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 11
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 34c88765-4366-4e74-8c58-12f43136f9e2 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 12
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 3b7b9567-48fd-412c-b75a-03b9e3c8ff79 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 13
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 57146249-a96b-48c9-a639-17cec8388fd4 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Mahakal, D
Reference 14
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 73529dca-f852-4ca2-9f96-67dc0d96ec98 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Romaka, M
Reference 15
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 1139922b-fc63-4fe8-9664-9287dd570e38 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 16
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 9a8c169b-522e-43b4-b353-3a458432d1bd · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Hook, H.E
Reference 17
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 92c202fe-9b8a-4111-816f-f6362f60d56f · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Cutler, J.F
Reference 18
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 9abe13ac-55e5-44a1-a518-3623f6dbd087 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 19
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation e22ced07-d338-449b-969b-1cbad7f80089 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Van Du, N.V
Reference 20
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation c46856c5-6b2a-4e18-906a-4d20226030c3 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 21
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation dcc69a32-d194-4fd9-90a0-93ad782acae4 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 22
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation b69de38d-5ca5-4bdd-8bb9-77e541825eac · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 23
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation deed6368-9350-48cc-a0f5-43674e33a026 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 24
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation e2802bac-1a83-4d11-8c50-427c7f764f68 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Rodríguez -Carvajal, Recent advances in magnetic structure determination by neutron powder diffraction, Phys
Reference 25
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 79b6a981-065d-40fb-a206-7f8f722addd2 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Runčevski, C.M
Reference 26
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation bca7b2fb-c0eb-45c2-98cd-17effcbf5aec · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 27
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 613543e2-5695-4e1b-805a-aadd3fdddfe6 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 28
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation c1627429-07dd-4018-b1f1-2371e19062b2 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Ungár, S
Reference 29
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 041893f7-a9d5-4b94-b446-f483ab45a98e · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Mahakal, D
Reference 30
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 3a850b52-68bd-4127-8ff8-94edef07ef31 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Kresse, J
Reference 31
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation de076e8b-a700-4e2f-9afa-6d3207ade817 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Perdew, K
Reference 32
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 7fb5e852-7a23-402d-9882-d7327e0ed54b · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Terada, K
Reference 33
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 40aacece-307b-4d90-86bb-6f8a661b089d · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Mahakal, A
Reference 34
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 1e9266e8-40df-4169-9406-99348075fad5 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Webster, K.R.A
Reference 35
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 99c26ea1-3aa7-45fe-8c61-1404d629320e · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Mahakal, D
Reference 36
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation cb29ca68-a734-42f7-b907-dfcf69d6eb60 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Hall, The Deformation and Ageing of Mild Steel: III Discussion of Results, Proc
Reference 37
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 6b54ccab-77a2-4cbc-a681-07350685f21e · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Petch, The Cleavage Strength of Polycrystals, J
Reference 38
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation b84b65fd-3558-44d9-b15c-cebe495f97ba · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 39
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 2dcb4815-6461-4ad6-8711-3ed9c779112b · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Miyazaki, O.M
Reference 40
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation aff18836-43f0-401a-97c6-ffcd54ba9567 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Mahakal, A
Reference 44
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation f39177f3-245e-482e-9642-6807bade7217 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Rausch, M.V
Reference 45
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 742b81f4-e6de-4cdc-a391-60e222c330ff · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 46
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 0e157518-fcfb-4d8e-ba15-d317c2cf1b16 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 47
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation b269a4ef-fddb-42e8-82b8-cf0b701a9b59 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Kramar, Y.L
Reference 49
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 03ec3add-994d-478a-a16b-32847f5f7b34 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Chang, Q
Reference 50
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 31681bb9-5f78-4cf8-be86-d4080381d160 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 51
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 67b6ec61-8eb0-4ae3-8d12-cf9829df5cc1 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Kumar, G
Reference 52
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 05c501bf-4d96-4639-bbd2-bf4a6dcb032f · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Sommerfeld, Zur elektronentheorie der metalle, Naturwissenschaften, 15 (1927) 825-832
Reference 53
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 0ef6998d-db8d-4524-917e-79191a827b16 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Fenton, J
Reference 54
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 233c4427-4e9c-4c68-9990-740b31a3ac43 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Bodak, L
Reference 55
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation cf9ba1f8-3077-49f8-984b-2985f8c4083a · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Modified Williamson -Hall plots and corresponding fittings for the polycrystalline TiCo1-xNixSb (x=0.0, 0.01, 0.02, 0.03, 0.04, and 0.06) half -Heusler alloys
Reference 56
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 874ecaa5-39ad-4585-b8ff-b36c68a622b4 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 57
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 45ae90f7-9315-4f14-88a8-b4d22656e120 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Williamson-Hall plots of the X-ray diffraction data for synthesized TiCo1-xNixSb (x=0, 0.01, 0.02, 0.03, 0.04, and 0.06) polycrystalline half -Heusler alloys
Reference 58
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation f3e86457-8f3f-4dc0-b293-01d9c36bbb64 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb (a) Electronic configuration of (a) Co and (b) Ti in TiCoSb HH alloy
Reference 59
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation d1a163af-bb46-4b71-bf5d-5e6a30bee98b · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Temperature-dependent electrical resistivity [ρ(T)] of TiCo 1-xNixSb (x=0, 0.01, 0.02, 0.03, 0.04, and 0.06) with the fitted curve indicated by solid red and blue lines
Reference 60
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation ab8ea465-b2c4-4d07-871c-187d8e9c5b56 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 61
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 7ee82606-72fd-4b49-8a5b-18867f615a3d · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 62
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation c30b624a-8d01-407c-a477-cda30fd5bfb7 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb The Williamson–Hall equation is given by [3], 𝛽𝑐𝑜𝑠𝜃 = 𝑘𝐵𝜆 𝐷 + 4𝜀 𝑠𝑖𝑛𝜃
Reference 63
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation f2b87ef0-eecb-42e3-9668-680603bdb07d · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb The electronic configuration of Co in TiCoSb is [Ar] 3d⁹4s⁰
Reference 64
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 832dabcc-df9f-450b-b43f-ed17acfe0559 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Therefore, the 1s→4p transition is the only possible route by which the 1s electron could be excited to the higher lying levels
Reference 65
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 78d26425-01b6-497e-a83b-05c673b42a73 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb However, synthesized samples become metallic for the range 0.03 <x<0.06
Reference 66
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 22ab7e6a-af28-4c3e-ba79-daf54dd1fae8 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 67
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 056faffd-a854-4dcc-894d-0344eb68323d · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Ungár, S
Reference 68
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 0b601697-4a55-4932-9e27-2b967c8d2868 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Unresolved cited work
Reference 69
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 74dd2154-02c3-4fef-aaa1-b2724261b03e · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Konigsberger, R
Reference 70
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 4f6f5b63-b2da-4b69-9531-ecb57fd6b8e7 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Ravel, M
Reference 71
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation cf86a9c1-5f96-4203-b2db-e9697850967b · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Parida, M
Reference 72
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation 3b609f2b-3853-4e31-a107-cf78a66d8548 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Sahoo, A
Reference 73
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
Observation debbf64b-c53f-45a5-8776-225843615245 · outbound
Anomalous Power Factor Enhancement and Local Structural Transition in Ni-Doped TiCoSb Pavlosiuk, D
Reference 74
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-14T06:32:32.682623+00:00.
No inbound Pith citation observations are available.