Content Provider
LeibnizOpen (The Leibniz Association)
38
Directory of Open Access Journals: DOAJ Articles
25
DataCite Metadata Store (German National Library of Science and Technology)
21
Unknown
19
University of California: eScholarship
11
Copernicus Publications: E-Journals
10
Natural Environment Research Council: NERC Open Research Archive
9
University of Canterbury, Christchurch: UC Research Repository
8
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
8
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
7
NASA Technical Reports Server (NTRS)
5
Niedersächsisches Online-Archiv NOA
5
University of Nebraska-Lincoln: DigitalCommons@UNL
5
University of Otago: Research Archive (OUR Archive)
5
University of Tasmania: UTas ePrints
5
Université de Nantes: HAL-UNIV-NANTES
5
eCite UTAS (University of Tasmania)
5
Cambridge University Press
4
Defense Technical Information Center: DTIC Technical Reports database
4
PubMed Central (PMC)
4
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
4
The University of Maine: DigitalCommons@UMaine
4
Université Grenoble Alpes: HAL
4
Columbia University: Academic Commons
3
Digital.CSIC (Spanish National Research Council)
3
Old Dominion University: ODU Digital Commons
3
Open Access Victoria University of Wellington / Te Herenga Waka
3
Apollo - University of Cambridge Repository
2
Curtin University: espace
2
ETH Zürich Research Collection
2
MDPI Open Access Publishing
2
Muséum National d'Histoire Naturelle (MNHM): HAL
2
Naval Postgraduate School: Calhoun
2
Portland State University: PDXScholar
2
University of Technology Sydney: OPUS - Open Publications of UTS Scholars
2
eScholarship Repository (University of California)
2
École Polytechnique, Université Paris-Saclay: HAL
2
AAAS Resource Center (American Association for the Advancement of Science)
1
Australian National University: ANU Digital Collections
1
Brunel University London: Brunel University Research Archive (BURA)
1
Central Washington University: ScholarWorks
1
DIAL@USL-B (Université Saint-Louis, Bruxelles)
1
Digital Collections of Colorado (Colorado State University)
1
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
1
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
1
Florida Online Journals (FloridaOJ)
1
Frontiers (Publisher)
1
Georgia Institute of Technology: SMARTech - Scholarly Materials and Research at Georgia Tech
1
Ghent University Academic Bibliography
1
HAL de l'Institut Polytechnique de Paris
1
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