Unresolvable Identifier

arXiv:2604.23618 · detector doi_compliance · cross_source · 2026-05-19 22:56:19.867135+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1016/j.optlastec..107180' is syntactically valid but the DOI registry (doi.org) returned 404, and Crossref / OpenAlex / internal corpus also have no record. The cited work could not be located through any authoritative source.

Paper page Integrity report arXiv Try DOI

Evidence text

Harinarayana V and Shin Y C 2021 Two-photon lithography for three -dimensional fabrication in micro/nanoscale regime: A comprehensive review Opt. Laser Technol. 142 107180 (doi: 10.1016/j.optlastec..107180 )

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1016/j.optlastec..107180",
  "raw_excerpt": "Harinarayana V and Shin Y C 2021 Two-photon lithography for three -dimensional fabrication in micro/nanoscale regime: A comprehensive review Opt. Laser Technol. 142 107180 (doi: 10.1016/j.optlastec..107180 )",
  "ref_index": 6,
  "verdict_class": "cross_source"
}