Unresolvable Identifier

arXiv:2605.03990 · detector doi_compliance · cross_source · 2026-05-19 14:51:23.301168+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1007/bf012942691' 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

V¨ ais¨ al¨ a, J.(1991) Bounded turning and quasiconformal maps.Monatshefte f¨ ur Mathematik111: 233–244https://doi.org/10.1007/BF012942691, 4

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1007/bf012942691",
  "raw_excerpt": "V\u00a8 ais\u00a8 al\u00a8 a, J.(1991) Bounded turning and quasiconformal maps.Monatshefte f\u00a8 ur Mathematik111: 233\u2013244https://doi.org/10.1007/BF012942691, 4",
  "ref_index": 8,
  "verdict_class": "cross_source"
}