Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links, observed 2026-08-14T13:46:39.834065Z
Paper Citation Record · LEDGER
As of 16 August 2026, this Paper Citation Record lists 50 of 50 outbound references and 0 inbound Pith citation observations for arXiv:1908.04544.
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 2026-08-14T13:46:39.834065Z
One-hop event checks from named stored sources.
Source: scholarly_work_events, retraction_status_cache, observed 2026-08-16T06:30:59.297886+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
50 of 50 outbound references displayed
External citation measurements
No source-named external measurement is stored.
Observation 5a7f9ca9-99b4-4998-beac-2a340a569a3d · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 1
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 278a9340-1f50-473e-a5de-6cb3476599c2 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 2
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation b1d6b126-cd23-4bf0-ac4a-f2975863ceea · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Agrachev and Yu.L
Reference 3
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 15a2cd76-ade5-4b36-bcb5-e43cf2695926 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 4
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 718d90f9-020d-4866-b69f-9ae80d8c7098 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 5
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 30219fd3-7b7a-4fb9-baa7-b0da8b2c2fdb · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Bryant and L
Reference 6
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 8b49a06a-b8fd-451d-a7a2-c91caf0d3331 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 7
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation db27e351-a338-431b-a2ae-e199b821d9f9 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Some remarks on G_2-structures
Reference 8
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 3c05d603-53bc-40fd-8ea1-d246bb698584 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures G_2 and the "Rolling Distribution"
Reference 9
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 38d3e8ae-804d-4ed9-8a49-eafc4f555fcd · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 10
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation b7e3ba00-b3b7-4bf8-89f6-13e9fdf019b0 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 11
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation b8150f5f-32b2-4e40-8099-8b7bbd0a4095 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Cartan, ``Sur la structure des groupes simples finis et continus'', C
Reference 12
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 5a211164-1d41-4a84-8171-b1816bbea6a9 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 13
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 5056770d-0b2c-4cab-8a40-f4b59c76b99e · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 14
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation c2e2d45d-267c-44e7-815c-80c47cfec0fa · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Cartan, (1893) Sur la structure des groupes simples finis et continus, C
Reference 15
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 23f84519-59e2-4dea-b5d2-c90ecd90d068 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Cartan, (1924) Sur les varietes a connection projective, Bull
Reference 16
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 2eed1fe6-addf-4c90-bc97-3376a2099dfe · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Cartan (1941) La geometria de las ecuaciones diferenciales de tercer orden Rev
Reference 17
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 82888629-ee93-42c9-8c8a-6a191bc6fb1e · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 18
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 17051d66-3fe6-4891-adf7-c89323a0d628 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Aerobatics of flying saucers
Reference 19
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation c38bdee5-efdb-4743-99b7-57fbcbdc9b04 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Aerodynamics of flying saucers
Reference 20
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 025e9edd-feea-4fe2-896e-2c69654294ce · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Engel, (1893) Sur un groupe simple a quatorze parametres, C
Reference 21
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 6e1a95bf-fb90-4342-9562-4d6d4e7a7cea · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 22
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 8a7b8ffe-72d0-43d0-b8e4-28acf166127f · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Contact Projective Structures
Reference 23
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation c7c9c85a-95ac-404c-9847-a252f18432b9 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 24
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation d1e1f5b5-0d78-43a5-ac06-56a0378e5d89 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 25
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 1f501e1d-8cc7-470e-a7a7-aae6b026e46e · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Godli\'nski, (2008) Geometry of third order ordinary differential equations and its applications in General Relativity, PhD thesis, Faculty of Physics, University of Warsaw
Reference 26
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation cfc512e5-40b0-4521-8adb-6f1828e5383c · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Geometry of third-order ODEs
Reference 27
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation b8c0e89e-f7ec-4fcf-b602-ac5cd4c55e13 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Gutt, Projective geometry of simple nonholonomic models, Colloquium at CFT PAS, 24 January 2014, https://www.youtube.com/watch?v=4LV3J\_mPUAI
Reference 28
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation f8f147c5-29e1-4853-9f49-2456ee54a39d · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Helgason, Sophus Lie, the mathematician, In Proceedings Sophus Lie Memorial Conference, Oslo 1992, O
Reference 29
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 3f750b72-9046-4133-b9e9-93978fe3fb71 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 30
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 27b631bd-e13e-4d3b-9f75-db22e8f05aa0 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures A car as parabolic geometry
Reference 31
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 3041c1b8-ede8-4751-8ed0-b80586dae9db · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 32
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 9e50e70f-e280-4941-a403-f4b052bcf63e · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Pansu, (1989), M\'etriques de Carnot-Carath\'eodory et quasiisom\'etries des espaces sym\'etriques de rang un, Annals of Mathematics, Second Series, 129 (1): 1 -- 60
Reference 33
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation dc5b9420-3df4-45a6-b309-dfac8735a81b · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Penrose, (1967), Twistor algebra, J
Reference 34
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 5521b746-226e-49e8-93f6-bba29a8062dc · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 35
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 22f9138c-c2c5-40b7-9292-4da79db2d552 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Eastwood, P
Reference 36
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation af023c55-2c4e-48ae-b995-98b13d13a82b · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Engel, ``Sur un groupe simple a quatorze parametres'', C
Reference 37
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 7c3cc95e-7ba0-4090-8d8d-9be8fa3653ff · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Parallel tractor extension and ambient metrics of holonomy split G_2
Reference 38
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation ec8dd26b-147b-40f3-bef7-04d91a9a4156 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 39
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation c16efabd-dac7-4575-8267-ea5245fff47e · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures (2010) ``Stabilizers of null k -planes in split real form of the exceptional Lie group G_2 '', mimeographic notes
Reference 40
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation bff7b6e1-3568-4a9b-be1f-f4f2e45800a8 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Montgomery, A Tour of Subriemannian Geometries, Their Geodesics and Applications,
Reference 41
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation ea0c1cc8-d700-4e0b-93a3-10a29a0c2855 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 42
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 772aaa67-2f33-4aa4-9ae3-5e72ec924707 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 43
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 07667002-e16c-4784-bc5c-a9b8a8952902 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Differential equations and conformal structures
Reference 44
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 0eb1feef-6a92-4821-8b03-92d282e16ab6 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Nurowski, ``Comment on (2, ) geometry of 4th order ODEs'', J
Reference 45
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 39ea276c-7db8-4663-bff2-15d8038f69b5 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Unresolved cited work
Reference 46
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 9be9e791-b8df-4963-b299-7e7aceeeb18b · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Penrose, ``Twistor algebra'', J
Reference 47
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation de16cf80-42be-4b96-b272-52bebf1a2e24 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Strazzullo, Symmetry Analysis of General Rank--3 Pfaffian Systems in Five Variables , (2009), PhD Thesis, Utah State University, Logan, Utah
Reference 48
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation a7d1196f-b294-4836-ba7a-04e655bccfff · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Szereszewski, private communications
Reference 49
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
Observation 3b3c7a9d-1efe-41a5-a044-86ae47c92ae4 · outbound
On certain classes of $Sp(2,R)$ symmetric $G_2$ structures Zelenko, ``On variational approach to differential invariants of rank two distributions'', Diff
Reference 50
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.
No inbound Pith citation observations are available.