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Data source
- Crossref[remove]16,203
- Web of Science (Lite)[remove]16,203
- Europe PubMed Central6,486
- PubMed6,439
- METADATA.UB1,274
- Manual1,048
- OPENSCIENCE.UB866
- arXiv860
- DBLP351
- RePEc40
- MLA22
- CiNii EN8
- CiNii JP6
- Google Books2