Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
6,698
Unknown
1,309
Directory of Open Access Journals: DOAJ Articles
1,283
Zenodo
1,020
Wiley Online Library
862
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
771
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
536
Research Data Australia (Australian National Data Service - ANDS)
519
PubMed Central (PMC)
479
PANGAEA - Data Publisher for Earth & Environmental Science
441
Natural Environment Research Council: NERC Open Research Archive
430
Université de Nantes: HAL-UNIV-NANTES
409
David Rumsey Historical Map Collection (Cartography Associates)
391
Cambridge University Press
313
Memorial University of Newfoundland: Research Repository
189
Érudit.org (Université Montréal)
189
Digital.CSIC (Spanish National Research Council)
169
Springer Nature (via Crossref)
164
Hathi Trust Digital Library
156
HAL - Université de La Rochelle
152
Oxford University Press (via Crossref)
152
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
149
University of California: eScholarship
145
Theses Canada/Thèses Canada (Library and Archives Canada)
142
Frontiers: Figshare
139
Dryad Digital Repository (Duke University)
135
Aarhus University: Research
132
eCite UTAS (University of Tasmania)
130
University of Tromsø: Munin Open Research Archive
127
HighWire Press (Stanford University)
125
University of Tasmania: UTas ePrints
119
Wiley Online Library (via Crossref)
119
University of Calgary Journal Hosting
118
University of Copenhagen: Research
112
University of Lethbridge Digitized Collections
110
WikiBooks - Open-content textbooks
104
Arctic Data Center (via DataONE)
103
MDPI Open Access Publishing
102
Oxford University Press
102
University of British Columbia: cIRcle - UBC's Information Repository
101
Institut national des sciences de l'Univers: HAL-INSU
99
JSTOR
98
University of Washington, Seattle: Digital Collections
98
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
97
Gallica - bibliothèque numérique de la Bibliothèque nationale de France (BnF)
97
Queen's University, Ontario: QSpace
97
University of Glasgow: Enlighten - Publications
96
RePEc (Research Papers in Economics)
91
Université de Montpellier: HAL
91
MIT Libraries Dome
89
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