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Data source
- Crossref[remove]21,601
- Web of Science (Lite)16,207
- Europe PubMed Central6,985
- PubMed6,805
- Manual2,522
- METADATA.UB1,605
- OPENSCIENCE.UB1,018
- arXiv1,017
- DBLP594
- MLA58
- RePEc43
- Google Books21
- CiNii EN9
- CiNii JP7