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Data source
- Crossref[remove]23,399
- Web of Science (Lite)16,192
- Europe PubMed Central6,969
- PubMed6,801
- OPENSCIENCE.UB2,877
- Manual2,503
- METADATA.UB1,917
- arXiv1,019
- DBLP590
- MLA58
- RePEc43
- Google Books20
- CiNii EN9
- CiNii JP7