Unresolvable Identifier

arXiv:2605.02829 · detector doi_compliance · cross_source · 2026-05-19 15:56:36.967231+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1016/j.jmva.2003.11.0096' 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

Ledoit, O., Wolf, M.: A well-conditioned estimator for large-dimensional covariance matrices. Journal of Multivariate Analysis88(2), 365–411 (2004).https://doi. org/10.1016/j.jmva.2003.11.0096

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1016/j.jmva.2003.11.0096",
  "raw_excerpt": "Ledoit, O., Wolf, M.: A well-conditioned estimator for large-dimensional covariance matrices. Journal of Multivariate Analysis88(2), 365\u2013411 (2004).https://doi. org/10.1016/j.jmva.2003.11.0096",
  "ref_index": 23,
  "verdict_class": "cross_source"
}