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Data source
- CiNii EN8
- CiNii JP6
- Crossref16,205
- DBLP380
- Europe PubMed Central6,593
- Google Books5
- METADATA.UB1,346
- MLA25
- Manual1,115
- OPENSCIENCE.UB867
- PubMed6,546
- RePEc43
- Web of Science (Lite)[remove]17,085
- arXiv876