Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
3,875
Unknown
3,228
Directory of Open Access Journals: DOAJ Articles
3,224
PANGAEA - Data Publisher for Earth & Environmental Science
2,561
Washington State University: WSU Libraries Digital Collections
2,280
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1,312
PubMed Central (PMC)
1,262
ScienceDirect (Elsevier - via Crossref)
1,066
Wiley Online Library
975
Wiley Online Library (via Crossref)
903
Institut national des sciences de l'Univers: HAL-INSU
875
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
861
Université de Nantes: HAL-UNIV-NANTES
800
Springer Nature (via Crossref)
779
Copernicus Publications: E-Journals
721
Defense Technical Information Center: DTIC Technical Reports database
651
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
576
Niedersächsisches Online-Archiv NOA
503
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
464
ScienceDirect (Elsevier)
454
ScholarsArchive@OSU (Oregon State University)
439
LeibnizOpen (The Leibniz Association)
438
MDPI Open Access Publishing
404
Cambridge University Press
391
HAL Sorbonne Université
378
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
351
Université de Bretagne Occidentale: HAL
347
eCite UTAS (University of Tasmania)
333
Canadian Science Publishing (via Crossref)
332
HighWire Press (Stanford University)
327
The Seattle Public Library Special Collections Online
285
University of California: eScholarship
282
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
281
Natural Environment Research Council: NERC Open Research Archive
267
University of Southampton: e-Prints Soton
252
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
248
Open Parks Network
244
Magnolia press
240
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
239
Hathi Trust Digital Library
225
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
223
Max Planck Society: MPG.PuRe
219
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
214
Digital.CSIC (Spanish National Research Council)
209
Muséum National d'Histoire Naturelle (MNHM): HAL
209
University of North Texas: UNT Digital Library
208
University of British Columbia: cIRcle - UBC's Information Repository
198
WikiBooks - Open-content textbooks
186
Biodiversity Heritage Library (BHL)
183
The University of Queensland: UQ eSpace
178
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