Unresolvable Identifier

arXiv:2605.06090 · detector doi_compliance · cross_source · 2026-05-19 12:57:10.330090+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1007/bf01077757' 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

N. N. Shapovalov,On a bilinear form on the universal enveloping algebra of a complex semisim- ple Lie algebra, Funct. Anal. Appl.6(1972), 307–312. doi:10.1007/BF01077757

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1007/bf01077757",
  "raw_excerpt": "N. N. Shapovalov,On a bilinear form on the universal enveloping algebra of a complex semisim- ple Lie algebra, Funct. Anal. Appl.6(1972), 307\u2013312. doi:10.1007/BF01077757",
  "ref_index": 7,
  "verdict_class": "cross_source"
}