Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
21,686
Directory of Open Access Journals: DOAJ Articles
27
Unknown
10
ScienceDirect (Elsevier - via Crossref)
9
National Institute of Polar Research Repository, Japan
8
Radiation Hygiene (E-Journal)
8
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences)
7
PubMed Central (PMC)
7
Copernicus Publications: E-Journals
6
Radiation Hygiene
6
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
5
Kyoto University Research Information Repository (KURENAI)
5
NOAA NCEI Environmental Data Archive (via DataONE)
5
Arctic Data Center (via DataONE)
4
Niedersächsisches Online-Archiv NOA
4
RePEc (Research Papers in Economics)
4
Springer Nature (via Crossref)
4
HELDA – University of Helsinki Open Repository
3
Kanazawa University Repository for Academic Resources (KURA)
3
National Institute of Radiological Science: NIRS-Repository
3
AAAS Resource Center (American Association for the Advancement of Science - via Crossref)
2
AgroParisTech: HAL (Institut des sciences et industries du vivant et de l'environnement)
2
ArXiv.org (Cornell University Library)
2
Colecciones digitales - Biblioteca Virtual del Banco de la República
2
Institut national des sciences de l'Univers: HAL-INSU
2
Iwate Prefectural University Institutional Repository
2
North Dakota State University (NDSU): Digital Horizons
2
Pamukkale University Repository
2
Senshu University: Institutional Repository
2
Technical University of Denmark: DTU Orbit
2
University of California: eScholarship
2
University of Lethbridge Digitized Collections
2
Université de Nantes: HAL-UNIV-NANTES
2
ARCIMÍS (Archivo Climatológico y Meteorológico Institucional - AEMET, Agencia Estatal de Meteorología)
1
Bentham Science Publishers (via Crossref)
1
Biblioteca Virtual de Defensa (BVD - Ministerio de Defensa de España)
1
CyberLeninka (Scientific Electronic Library)
1
DIAL@USL-B (Université Saint-Louis, Bruxelles)
1
DORA Eawag
1
FBA Journal System (Freshwater Biological Association)
1
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences)
1
Hindawi Publishing Corporation
1
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
1
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
1
IOP Publishing
1
IRIS Università degli Studi di Palermo
1
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
1
International Society for the Systems Sciences: Journals ISSS
1
JYX - Jyväskylä University Digital Archive
1
Kansai University Repository
1
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