Unresolvable Identifier

arXiv:2605.06695 · detector doi_compliance · cross_source · 2026-05-19 16:22:45.380189+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1016/s0020-0255(98)00135-3' 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

M. S. Sunitha, & A. Vijayakumar, A characterization of fuzzy trees,Inf. Sci.113(3–4) (1999), 293–300, DOI: 10.1016/S0020-0255(98)00135-3

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1016/s0020-0255(98)00135-3",
  "raw_excerpt": "M. S. Sunitha, & A. Vijayakumar, A characterization of fuzzy trees,Inf. Sci.113(3\u20134) (1999), 293\u2013300, DOI: 10.1016/S0020-0255(98)00135-3",
  "ref_index": 12,
  "verdict_class": "cross_source"
}