Unresolvable Identifier

arXiv:2605.04371 · detector doi_compliance · cross_source · 2026-05-19 14:29:58.511496+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1136/bmjinnov-2018-000270' 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

Bo-Chiuan Chen, Dong-Chul Seo, Hsien-Chang Lin, and David Crandall. 2018. Framework for estimating sleep timing from digital footprints.BMJ Innovations4, 4 (2018). doi:10.1136/bmjinnov-2018-000270

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1136/bmjinnov-2018-000270",
  "raw_excerpt": "Bo-Chiuan Chen, Dong-Chul Seo, Hsien-Chang Lin, and David Crandall. 2018. Framework for estimating sleep timing from digital footprints.BMJ Innovations4, 4 (2018). doi:10.1136/bmjinnov-2018-000270",
  "ref_index": 8,
  "verdict_class": "cross_source"
}