Unresolvable Identifier

arXiv:2605.06556 · detector doi_compliance · cross_source · 2026-05-19 12:35:21.348759+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1007/978-3-319-64707-2' 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

Pukelsheim, Friedrich , title =. 2017 , publisher =. doi:10.1007/978-3-319-64707-2 , url =

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1007/978-3-319-64707-2",
  "raw_excerpt": "Pukelsheim, Friedrich , title =. 2017 , publisher =. doi:10.1007/978-3-319-64707-2 , url =",
  "ref_index": 7,
  "verdict_class": "cross_source"
}