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Data source
- Crossref[remove]21,054
- Web of Science (Lite)15,844
- Europe PubMed Central6,903
- PubMed6,728
- Manual2,453
- METADATA.UB1,489
- OPENSCIENCE.UB1,008
- arXiv1,000
- DBLP472
- MLA56
- RePEc43
- Google Books20
- CiNii EN9
- CiNii JP7