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Data source
- Crossref[remove]18,954
- Web of Science (Lite)15,504
- Europe PubMed Central6,816
- PubMed6,765
- Manual2,023
- METADATA.UB1,423
- OPENSCIENCE.UB1,002
- arXiv997
- DBLP302
- RePEc41
- MLA39
- CiNii EN9
- CiNii JP7
- Google Books1