Unresolvable Identifier

arXiv:2605.23265 · detector doi_compliance · cross_source · 2026-05-25 03:18:22.211645+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1007/s00453-021-00847-1' 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 Sub-exponential FPT Algorithm and a Polynomial Kernel for Minimum Directed Bisection on Semicomplete Digraphs , author=. Algorithmica , volume=. 2021 , publisher=. doi:10.1007/s00453-021-00847-1 , note=

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1007/s00453-021-00847-1",
  "raw_excerpt": "A Sub-exponential FPT Algorithm and a Polynomial Kernel for Minimum Directed Bisection on Semicomplete Digraphs , author=. Algorithmica , volume=. 2021 , publisher=. doi:10.1007/s00453-021-00847-1 , note=",
  "ref_index": 48,
  "verdict_class": "cross_source"
}