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Data source
- Web of Science (Lite)[remove]17,115
- Crossref16,235
- Europe PubMed Central6,605
- PubMed6,559
- METADATA.UB1,351
- Manual1,117
- OPENSCIENCE.UB884
- arXiv878
- DBLP379
- RePEc43
- MLA25
- CiNii EN8
- CiNii JP6
- Google Books5