Unresolvable Identifier

arXiv:2604.21750 · detector doi_compliance · cross_source · 2026-05-20 00:41:58.576601+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1007/s11257-015-9165-7' 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

What Recommenders Recommend: An Analysis of Accuracy, Popularity, and Diversity.User Modeling and User-Adapted Interaction25, 1 (2015), 89–129. doi:10.1007/s11257-015-9165-7

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1007/s11257-015-9165-7",
  "raw_excerpt": "What Recommenders Recommend: An Analysis of Accuracy, Popularity, and Diversity.User Modeling and User-Adapted Interaction25, 1 (2015), 89\u2013129. doi:10.1007/s11257-015-9165-7",
  "ref_index": 41,
  "verdict_class": "cross_source"
}