Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,183
Directory of Open Access Journals: DOAJ Articles
1,183
Unknown
1,097
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
788
PANGAEA - Data Publisher for Earth & Environmental Science
786
SFU Digitized Collections (Simon Fraser University)
642
Université de Nantes: HAL-UNIV-NANTES
584
PubMed Central (PMC)
344
Institut national des sciences de l'Univers: HAL-INSU
278
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
275
Copernicus Publications: E-Journals
268
Wiley Online Library
225
eCite UTAS (University of Tasmania)
221
LeibnizOpen (The Leibniz Association)
214
University of British Columbia: cIRcle - UBC's Information Repository
210
Springer Nature (via Crossref)
180
Hathi Trust Digital Library
177
The University of Winnipeg: WinnSpace Repository
176
WikiBooks - Open-content textbooks
176
National Institute of Polar Research Repository, Japan
175
ScienceDirect (Elsevier - via Crossref)
172
Niedersächsisches Online-Archiv NOA
165
Washington State University: WSU Libraries Digital Collections
149
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
148
The Seattle Public Library Special Collections Online
140
Cambridge University Press
138
Defense Technical Information Center: DTIC Technical Reports database
137
University of the Pacific, McGeorge School of Law: Scholarly Commons
118
University of the Pacific: Scholarly Commons
118
University of Lethbridge Digitized Collections
115
University of Tasmania: UTas ePrints
115
Natural Environment Research Council: NERC Open Research Archive
109
University of Southampton: e-Prints Soton
103
National Institute of Oceanography, India: Digital Repository Service (DRS@nio)
99
HAL - Université de La Rochelle
91
HighWire Press (Stanford University)
90
Theses Canada/Thèses Canada (Library and Archives Canada)
89
Oklahoma State University: Digital Collections @ OKSTATE Library
88
University of Calgary Journal Hosting
84
MDPI Open Access Publishing
80
Digital.CSIC (Spanish National Research Council)
79
Université de Bretagne Occidentale: HAL
78
oURspace - The University of Regina's Institutional Repository
73
Magnolia press
67
Hunter Library Digital Collections (Western Carolina University)
65
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
62
ScienceDirect (Elsevier)
62
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
59
University of California: eScholarship
58
Central Marine Fisheries Research Institute, Kochi, India: Eprints@CMFRI
57
more ...