Unresolvable Identifier

arXiv:2605.20669 · detector doi_compliance · cross_source · 2026-05-21 05:53:18.192112+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.3390/sym17010xxx' 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

H. Song, J. Xie, Liang, Y. Su, Y. Xiao, X. Zhang, Y. Ouyang, X. Li, S. Chen, Y. Li, Symmetrical learning and transferring: Efficient knowl- edge distillation for remote sensing image classification, Symmetry 17 (2025).doi:https://doi.org/10.3390/sym17010XXX

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.3390/sym17010xxx",
  "raw_excerpt": "H. Song, J. Xie, Liang, Y. Su, Y. Xiao, X. Zhang, Y. Ouyang, X. Li, S. Chen, Y. Li, Symmetrical learning and transferring: Efficient knowl- edge distillation for remote sensing image classification, Symmetry 17 (2025).doi:https://doi.org/10.3390/sym17010XXX",
  "ref_index": 33,
  "verdict_class": "cross_source"
}