Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
135
PANGAEA - Data Publisher for Earth & Environmental Science
95
WikiBooks - Open-content textbooks
30
Unknown
28
Directory of Open Access Journals: DOAJ Articles
21
Defense Technical Information Center: DTIC Technical Reports database
20
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
16
Institut national des sciences de l'Univers: HAL-INSU
14
Zenodo
14
University of Calgary Journal Hosting
12
Copernicus Publications: E-Journals
11
Washington State University: WSU Libraries Digital Collections
11
HAL Sorbonne Université
10
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
9
Niedersächsisches Online-Archiv NOA
8
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
8
Université de Nantes: HAL-UNIV-NANTES
8
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
8
Archives ouvertes de Paris-Saclay
7
Cambridge University Press
7
École Polytechnique, Université Paris-Saclay: HAL
7
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
5
Muséum National d'Histoire Naturelle (MNHM): HAL
5
Université de Paris: Portail HAL
5
Lund University Publications (LUP)
4
PubMed Central (PMC)
4
ScienceDirect (Elsevier - via Crossref)
4
University College London: UCL Discovery
4
University of Bergen: Bergen Open Research Archive (BORA-UiB)
4
University of Southampton: e-Prints Soton
4
University of Tromsø: Munin Open Research Archive
4
HAL de l'Institut Polytechnique de Paris
3
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
3
Météo-France: HAL
3
Natural Environment Research Council: NERC Open Research Archive
3
Technical University of Denmark: DTU Orbit
3
Université Toulouse III - Paul Sabatier: HAL-UPS
3
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
3
AAAS Resource Center (American Association for the Advancement of Science - via Crossref)
2
AAAS Resource Center (American Association for the Advancement of Science)
2
Arctic Portal Library
2
Georg-August-Universität Göttingen: GoeScholar
2
Hereon Publications (Helmholtz-Zentrum)
2
Hrčak - Portal of scientific journals of Croatia
2
Institute for Marine Research: Brage IMR
2
MDPI Open Access Publishing
2
Max Planck Society: MPG.PuRe
2
National Institute of Polar Research Repository, Japan
2
Portail HAL-ANR (Agence Nationale de la Recherche)
2
The Library of Congress: American Memory
2
more ...