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Data source
- Crossref[remove]23,443
- Web of Science (Lite)16,213
- Europe PubMed Central6,975
- PubMed6,810
- OPENSCIENCE.UB2,885
- Manual2,515
- METADATA.UB1,917
- arXiv1,019
- DBLP591
- MLA58
- RePEc43
- Google Books21
- CiNii EN9
- CiNii JP7