Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
27,059
PANGAEA - Data Publisher for Earth & Environmental Science
27,040
NOAA NCEI Environmental Data Archive (via DataONE)
7,308
Unknown
6,420
Directory of Open Access Journals: DOAJ Articles
4,399
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2,924
Zenodo
2,828
Digital.CSIC (Spanish National Research Council)
2,545
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
2,090
Institut national des sciences de l'Univers: HAL-INSU
2,058
Université de Nantes: HAL-UNIV-NANTES
1,843
Copernicus Publications: E-Journals
1,827
ScienceDirect (Elsevier - via Crossref)
1,626
Defense Technical Information Center: DTIC Technical Reports database
1,557
Springer Nature (via Crossref)
1,515
Wiley Online Library
1,497
LeibnizOpen (The Leibniz Association)
1,480
Instituto Español de Oceanografía: e-IEO
1,478
Wiley Online Library (via Crossref)
1,387
USGS Science Data Catalog (via DataONE)
1,316
PubMed Central (PMC)
1,274
Niedersächsisches Online-Archiv NOA
1,272
University of Southampton: e-Prints Soton
1,245
Natural Environment Research Council: NERC Open Research Archive
1,191
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
1,149
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1,088
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
987
Cambridge University Press
844
HAL Sorbonne Université
831
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
802
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
776
Biological and Chemical Oceanography Data Management Office (BCO-DMO) (via DataONE)
768
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
762
Max Planck Society: MPG.PuRe
708
University of California: eScholarship
670
David Rumsey Historical Map Collection (Cartography Associates)
651
ScienceDirect (Elsevier)
615
HighWire Press (Stanford University)
549
MDPI Open Access Publishing
543
CentAUR: Central Archive at the University of Reading
537
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
532
Université de Bretagne Occidentale: HAL
503
Oxford University Press (via Crossref)
501
RePEc (Research Papers in Economics)
493
Biodiversity Heritage Library (BHL)
492
Frontiers: Figshare
486
École Polytechnique, Université Paris-Saclay: HAL
450
NASA Technical Reports Server (NTRS)
434
Archives ouvertes de Paris-Saclay
429
Universidad de Las Palmas de Gran Canaria: Acceda
417
more ...