Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
4,826
Zenodo
57
Unknown
33
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
29
Biodiversity Heritage Library (BHL)
20
Directory of Open Access Journals: DOAJ Articles
17
NOAA NCEI Environmental Data Archive (via DataONE)
14
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
12
Oxford University Press (via Crossref)
10
University of St Andrews: Research Portal
10
PubMed Central (PMC)
8
University of Nebraska-Lincoln: DigitalCommons@UNL
8
David Rumsey Historical Map Collection (Cartography Associates)
7
Digital.CSIC (Spanish National Research Council)
7
Université de Nantes: HAL-UNIV-NANTES
7
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
6
Biological and Chemical Oceanography Data Management Office (BCO-DMO) (via DataONE)
6
Max Planck Society: MPG.PuRe
6
PANGAEA - Data Publisher for Earth & Environmental Science
6
University of California: eScholarship
6
University of Michigan: Digital Collections
6
Cambridge University Press
5
Dryad Digital Repository (Duke University)
5
Magnolia press
5
The University of Texas at Austin: Texas ScholarWorks
5
WikiBooks - Open-content textbooks
5
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
5
Connexions (Educational Material)
4
Digital Collections of Colorado (Colorado State University)
4
Frontiers: Figshare
4
Hathi Trust Digital Library
4
HighWire Press (Stanford University)
4
Mountain Scholar (Digital Collections of Colorado and Wyoming)
4
Nova Southeastern University: NSU Works
4
Research Data Australia (Australian National Data Service - ANDS)
4
The Royal Society (via Crossref)
4
UTSA Digital Collections (The University of Texas at San Antonio)
4
Wiley Online Library (via Crossref)
4
Canadian Science Publishing (via Crossref)
3
Dialnet - Portada de revistas (Universidad de La Rioja)
3
Institut national des sciences de l'Univers: HAL-INSU
3
Knowledge Network for Biocomplexity (via DataONE)
3
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
3
PUB - Publications at Bielefeld University
3
ScholarsArchive@OSU (Oregon State University)
3
Sistema de Publicaciones de la USFQ (Universidad San Francisco de Quito)
3
The University of Queensland: UQ eSpace
3
University of Southampton: e-Prints Soton
3
University of Washington, Seattle: Digital Collections
3
American Museum of Natural History: AMNH scientific publications
2
more ...