Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
15,511
PANGAEA - Data Publisher for Earth & Environmental Science
10,383
Arctic Data Center (via DataONE)
2,745
DataCite
2,197
Unknown
2,159
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1,757
Directory of Open Access Journals: DOAJ Articles
1,541
NOAA NCEI Environmental Data Archive (via DataONE)
1,527
David Rumsey Historical Map Collection (Cartography Associates)
1,285
Defense Technical Information Center: DTIC Technical Reports database
1,048
Zenodo
705
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
670
Copernicus Publications: E-Journals
624
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
512
Springer Nature (via Crossref)
449
ScienceDirect (Elsevier - via Crossref)
447
LeibnizOpen (The Leibniz Association)
415
Niedersächsisches Online-Archiv NOA
415
Institut national des sciences de l'Univers: HAL-INSU
409
Wiley Online Library
367
PubMed Central (PMC)
349
ScienceDirect (Elsevier)
336
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
324
Université de Nantes: HAL-UNIV-NANTES
313
Frontiers: Figshare
296
University of Tromsø: Munin Open Research Archive
279
HAL Sorbonne Université
253
Digital.CSIC (Spanish National Research Council)
222
Natural Environment Research Council: NERC Open Research Archive
202
MDPI Open Access Publishing
192
University of Southampton: e-Prints Soton
184
Research Workspace (via DataONE)
181
Max Planck Society: MPG.PuRe
172
Cambridge University Press
169
Frontiers (Publisher)
168
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
163
Technical University of Denmark: DTU Orbit
157
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
154
Biodiversity Heritage Library (BHL)
153
University of Bergen: Bergen Open Research Archive (BORA-UiB)
150
Aarhus University: Research
149
WikiBooks - Open-content textbooks
149
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
146
Biological and Chemical Oceanography Data Management Office (BCO-DMO) (via DataONE)
140
University of Calgary Journal Hosting
138
Archives ouvertes de Paris-Saclay
137
Naval Postgraduate School: Calhoun
133
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
132
University of New Hampshire: Scholars Repository
127
National Institute of Polar Research Repository, Japan
121
more ...