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Data source
- CiNii EN8
- CiNii JP6
- Crossref16,213
- DBLP379
- Europe PubMed Central6,595
- Google Books5
- METADATA.UB1,350
- MLA25
- Manual1,117
- OPENSCIENCE.UB880
- PubMed6,548
- RePEc43
- Web of Science (Lite)[remove]17,092
- arXiv878