Unresolvable Identifier

arXiv:2605.22895 · detector doi_compliance · cross_source · 2026-05-25 06:00:03.530742+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1023/a:1001920232180.url:https://doi.org/10.1023/a:1001920232180' 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

S. P. Drake and P. Szekeres. “Uniqueness of the Newman–Janis Algorithm in Generating the Kerr–Newman Metric”. In:Gen. Relativ. Gravit.32 (2000), pp. 445–457.issn: 1572-9532.doi: 10.1023/A:1001920232180.url:https://doi.org/10.1023/A:1001920232180

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1023/a:1001920232180.url:https://doi.org/10.1023/a:1001920232180",
  "raw_excerpt": "S. P. Drake and P. Szekeres. \u201cUniqueness of the Newman\u2013Janis Algorithm in Generating the Kerr\u2013Newman Metric\u201d. In:Gen. Relativ. Gravit.32 (2000), pp. 445\u2013457.issn: 1572-9532.doi: 10.1023/A:1001920232180.url:https://doi.org/10.1023/A:1001920232180",
  "ref_index": 14,
  "verdict_class": "cross_source"
}