Content Provider
LeibnizOpen (The Leibniz Association)
107
DataCite Metadata Store (German National Library of Science and Technology)
79
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
61
Unknown
55
Directory of Open Access Journals: DOAJ Articles
45
Natural Environment Research Council: NERC Open Research Archive
33
PANGAEA - Data Publisher for Earth & Environmental Science
33
Copernicus Publications: E-Journals
23
Arctic Data Center (via DataONE)
22
Cambridge University Press
20
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
19
University of California: eScholarship
18
Niedersächsisches Online-Archiv NOA
16
eCite UTAS (University of Tasmania)
15
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
12
Institut national des sciences de l'Univers: HAL-INSU
11
University of Bristol: Bristol Research
11
PubMed Central (PMC)
10
University of Tasmania: UTas ePrints
10
Apollo - University of Cambridge Repository
9
Digital Commons University of South Florida (USF)
9
Research Data Australia (Australian National Data Service - ANDS)
9
University of South Florida St. Petersburg: Digital USFSP
9
Université de Nantes: HAL-UNIV-NANTES
9
Aarhus University: Research
8
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
8
Montclair State University Digital Commons
8
Northumbria University, Newcastle: Northumbria Research Link (NRL)
7
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
7
White Rose Research Online (Universities of Leeds, Sheffield & York)
7
Zenodo
7
Digital.CSIC (Spanish National Research Council)
6
Imperial College London: Spiral
6
Old Dominion University: ODU Digital Commons
6
University of Canterbury, Christchurch: UC Research Repository
6
University of Southampton: e-Prints Soton
6
University of St Andrews: Digital Research Repository
6
Université Grenoble Alpes: HAL
6
Utrecht University Repository
6
Australian National University: ANU Digital Collections
5
Cardiff University: ORCA (Online Research @ Cardiff)
5
Durham University: Durham Research Online
5
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
5
University of St Andrews: Research Portal
5
University of Tromsø: Munin Open Research Archive
5
CentAUR: Central Archive at the University of Reading
4
German Aerospace Center: elib - DLR electronic library
4
IEDA: US Antarctic Program Data Center (via DataONE)
4
National Institute of Polar Research Repository, Japan
4
University College London: UCL Discovery
4
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