Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,163
Directory of Open Access Journals: DOAJ Articles
1,069
Unknown
887
PANGAEA - Data Publisher for Earth & Environmental Science
852
Aarhus University: Research
819
University of Copenhagen: Research
519
University of Calgary Journal Hosting
435
LeibnizOpen (The Leibniz Association)
378
Copernicus Publications: E-Journals
330
PubMed Central (PMC)
311
Defense Technical Information Center: DTIC Technical Reports database
271
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
265
Technical University of Denmark: DTU Orbit
205
Niedersächsisches Online-Archiv NOA
201
University of Tromsø: Munin Open Research Archive
174
Université de Nantes: HAL-UNIV-NANTES
165
Wiley Online Library
151
Springer Nature (via Crossref)
130
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
127
Cambridge University Press
117
Apollo - University of Cambridge Repository
115
Institut national des sciences de l'Univers: HAL-INSU
111
Arctic Council Repository
94
MDPI Open Access Publishing
83
Lund University Publications (LUP)
80
Natural Environment Research Council: NERC Open Research Archive
79
University of Bergen: Bergen Open Research Archive (BORA-UiB)
76
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
76
Digital.CSIC (Spanish National Research Council)
69
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
63
ScienceDirect (Elsevier - via Crossref)
61
Roskilde University Research Portal (RUC)
57
Polar Research (E-Journal)
53
HighWire Press (Stanford University)
52
National Institute of Polar Research Repository, Japan
51
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
51
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
50
Institute for Marine Research: Brage IMR
50
Aarhus University: OJS at The State and University Library
49
Canadian Science Publishing (via Crossref)
45
ETH Zürich Research Collection
44
University of Southampton: e-Prints Soton
44
Max Planck Society: MPG.PuRe
43
Tidsskrift.dk (The Royal Library, Denmark)
43
Utrecht University Repository
43
University of Southern Denmark Research Portal
42
White Rose Research Online (Universities of Leeds, Sheffield & York)
42
HELDA – University of Helsinki Open Repository
40
Informa (via Crossref)
40
NIOZ Repository (Royal Netherlands Institute for Sea Research)
39
more ...