Unresolvable Identifier

arXiv:2605.15420 · detector doi_compliance · cross_source · 2026-05-19 15:21:06.293886+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1016/s0375-9601(97)00349-0' 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

A. F. Ra˜ nada and J. L. Trueba, “Two properties of electromagnetic knots”, Phys. Lett. A 232, 25 (1997). DOI: 10.1016/S0375-9601(97)00349-0

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1016/s0375-9601(97)00349-0",
  "raw_excerpt": "A. F. Ra\u02dc nada and J. L. Trueba, \u201cTwo properties of electromagnetic knots\u201d, Phys. Lett. A 232, 25 (1997). DOI: 10.1016/S0375-9601(97)00349-0",
  "ref_index": 10,
  "verdict_class": "cross_source"
}