Content Provider
Defense Technical Information Center: DTIC Technical Reports database
412
DataCite Metadata Store (German National Library of Science and Technology)
255
Directory of Open Access Journals: DOAJ Articles
35
Copernicus Publications: E-Journals
25
Unknown
23
Arctic Data Center (via DataONE)
20
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
15
Niedersächsisches Online-Archiv NOA
12
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
10
Institut national des sciences de l'Univers: HAL-INSU
9
Université de Nantes: HAL-UNIV-NANTES
7
PubMed Central (PMC)
6
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
6
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
5
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
5
Northumbria University, Newcastle: Northumbria Research Link (NRL)
5
Oxford University Press (via Crossref)
5
University of Calgary Journal Hosting
5
University of Potsdam: publish.UP
5
Aarhus University: Research
4
Hereon Publications (Helmholtz-Zentrum)
4
MDPI Open Access Publishing
4
PANGAEA - Data Publisher for Earth & Environmental Science
4
Vrije Universiteit Amsterdam (VU): Research Portal
4
Apollo - University of Cambridge Repository
3
Arctic Council Repository
3
ETH Zürich Research Collection
3
Freie Universität Berlin: Refubium (FU Berlin)
3
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
3
Lund University Publications (LUP)
3
Naval Postgraduate School: Calhoun
3
Polar Research (E-Journal)
3
RePEc (Research Papers in Economics)
3
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
3
Tomsk State University Research Library
3
University of Bergen: Bergen Open Research Archive (BORA-UiB)
3
University of Southampton: e-Prints Soton
3
Arctic Portal Library
2
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
2
Digital.CSIC (Spanish National Research Council)
2
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
2
HAL Sorbonne Université
2
Institut national de la recherche scientifique, Québec: Espace INRS
2
NASA Technical Reports Server (NTRS)
2
NIOZ Repository (Royal Netherlands Institute for Sea Research)
2
Natural Environment Research Council: NERC Open Research Archive
2
OSKAR Bordeaux (Open Science Knowledge ARchive)
2
Old Dominion University: ODU Digital Commons
2
Stockholm University: Publications (DiVA)
2
Technical University of Denmark: DTU Orbit
2
more ...