Unresolvable Identifier

arXiv:2604.22512 · detector doi_compliance · cross_source · 2026-05-19 23:55:08.063855+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1016/0893-6080(91' 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

Hornik, K.: Approximation capabilities of multilayer feedforward networks. Neural Networks4(2), 251–257 (1991) https://doi.org/10.1016/0893-6080(91) 90009-T

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1016/0893-6080(91",
  "raw_excerpt": "Hornik, K.: Approximation capabilities of multilayer feedforward networks. Neural Networks4(2), 251\u2013257 (1991) https://doi.org/10.1016/0893-6080(91) 90009-T",
  "ref_index": 33,
  "verdict_class": "cross_source"
}