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Data source
- CiNii EN12
- CiNii JP10
- Crossref19,008
- DBLP355
- Europe PubMed Central6,965
- Google Books2
- METADATA.UB3,689
- MLA94
- Manual4,323
- OPENSCIENCE.UB1,062
- PubMed6,915
- RePEc57
- Web of Science (Lite)15,933
- arXiv1,188