Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
27,280
Unknown
5,550
Directory of Open Access Journals: DOAJ Articles
4,840
DataCite
4,017
DataCite Metadata Store (German National Library of Science and Technology)
3,187
Wiley Online Library
2,960
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2,772
Institut national des sciences de l'Univers: HAL-INSU
2,032
Copernicus Publications: E-Journals
1,972
Digital.CSIC (Spanish National Research Council)
1,754
Université de Nantes: HAL-UNIV-NANTES
1,747
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1,734
Defense Technical Information Center: DTIC Technical Reports database
1,557
LeibnizOpen (The Leibniz Association)
1,423
PubMed Central (PMC)
1,354
Niedersächsisches Online-Archiv NOA
1,303
ScienceDirect (Elsevier - via Crossref)
1,295
Springer Nature (via Crossref)
1,270
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
1,121
Instituto Español de Oceanografía: e-IEO
959
ScienceDirect (Elsevier)
891
HAL Sorbonne Université
838
Cambridge University Press
812
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
795
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
790
University of Southampton: e-Prints Soton
772
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
768
Natural Environment Research Council: NERC Open Research Archive
663
Max Planck Society: MPG.PuRe
657
University of St Andrews: Research Portal
567
HighWire Press (Stanford University)
549
MDPI Open Access Publishing
543
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
538
Université de Bretagne Occidentale: HAL
492
École Polytechnique, Université Paris-Saclay: HAL
446
Archives ouvertes de Paris-Saclay
439
Oxford University Press
432
Aarhus University: Research
383
Muséum National d'Histoire Naturelle (MNHM): HAL
381
University of Copenhagen: Research
377
University of Bergen: Bergen Open Research Archive (BORA-UiB)
375
Université de Paris: Portail HAL
375
CentAUR: Central Archive at the University of Reading
366
Universidad de Las Palmas de Gran Canaria: Acceda
359
Zenodo
317
University of the Highlands and Islands: Research Database of UHI
316
Biodiversity Heritage Library (BHL)
315
SAGE Publications
307
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
282
AAAS Resource Center (American Association for the Advancement of Science)
279
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