Unresolvable Identifier

arXiv:2604.25556 · detector doi_compliance · cross_source · 2026-05-19 21:04:46.156342+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1016/0020-0190(96' 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

Leizhen Cai. Fixed-parameter tractability of graph modification problems for heredi- tary properties.Inf. Process. Lett., 58(4):171–176, 1996. doi:10.1016/0020-0190(96) 00050-6

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1016/0020-0190(96",
  "raw_excerpt": "Leizhen Cai. Fixed-parameter tractability of graph modification problems for heredi- tary properties.Inf. Process. Lett., 58(4):171\u2013176, 1996. doi:10.1016/0020-0190(96) 00050-6",
  "ref_index": 6,
  "verdict_class": "cross_source"
}