Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,168
PANGAEA - Data Publisher for Earth & Environmental Science
77
NOAA NCEI Environmental Data Archive (via DataONE)
21
Research Data Australia (Australian National Data Service - ANDS)
20
DataCite
14
Zenodo
14
Directory of Open Access Journals: DOAJ Articles
8
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
7
Unknown
7
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
5
Defense Technical Information Center: DTIC Technical Reports database
5
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
4
Institut national des sciences de l'Univers: HAL-INSU
4
Natural Environment Research Council: NERC Open Research Archive
4
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
4
Wiley Online Library
4
Cambridge University Press
3
Copernicus Publications: E-Journals
3
Magnolia press
3
Niedersächsisches Online-Archiv NOA
3
University of Southampton: e-Prints Soton
3
BioOne Online Journals
2
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
2
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
2
NASA Technical Reports Server (NTRS)
2
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
2
PubMed Central (PMC)
2
Universidade Estadual Paulista São Paulo: Repositório Institucional UNESP
2
University of Cape Town: OpenUCT
2
AAAS Resource Center (American Association for the Advancement of Science)
1
ARUd'A - Archivio Istituzionale della ricerca dell'università Chieti-Pescara (IRIS)
1
Aix-Marseille Université: HAL
1
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
1
Archives ouvertes de Paris-Saclay
1
Arctic Portal Library
1
Biodiversity Heritage Library (BHL)
1
Caltech Authors (California Institute of Technology)
1
Collège de France: HAL
1
Columbia University: Academic Commons
1
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
1
David Rumsey Historical Map Collection (Cartography Associates)
1
Digital Library Thüringen
1
Digital.CSIC (Spanish National Research Council)
1
Discovery - University of Dundee Online Publications
1
EPHE (Ecole pratique des hautes études, Paris): HAL
1
Frontiers (Publisher)
1
Griffith University: Griffith Research Online
1
HAL Sorbonne Université
1
HAL de l'Institut Polytechnique de Paris
1
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
1
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