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Data source
- Crossref[remove]23,534
- Web of Science (Lite)16,253
- Europe PubMed Central7,008
- PubMed6,828
- OPENSCIENCE.UB2,898
- Manual2,533
- METADATA.UB1,917
- arXiv1,019
- DBLP594
- MLA58
- RePEc43
- Google Books21
- CiNii EN9
- CiNii JP7