Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
567
Directory of Open Access Journals: DOAJ Articles
180
Unknown
113
Zenodo
90
University of Tromsø: Munin Open Research Archive
58
Copernicus Publications: E-Journals
49
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
48
PANGAEA - Data Publisher for Earth & Environmental Science
45
LeibnizOpen (The Leibniz Association)
39
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
38
PubMed Central (PMC)
35
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
31
Niedersächsisches Online-Archiv NOA
30
Université de Nantes: HAL-UNIV-NANTES
30
Frontiers: Figshare
28
MDPI Open Access Publishing
26
Polar Research (E-Journal)
24
Institut national des sciences de l'Univers: HAL-INSU
23
Arctic Data Center (via DataONE)
22
University of Bergen: Bergen Open Research Archive (BORA-UiB)
17
De Gruyter (via Crossref)
16
ScienceDirect (Elsevier - via Crossref)
16
Cambridge University Press
15
Jagiellonian University Repository
15
Springer Nature (via Crossref)
15
Informa (via Crossref)
13
Natural Environment Research Council: NERC Open Research Archive
13
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
13
Wiley Online Library (via Crossref)
13
Wiley Online Library
12
Digital.CSIC (Spanish National Research Council)
11
The Czech Academy of Sciences: Publication Activity (ASEP)
11
Frontiers (Publisher)
10
Magnolia press
10
Masaryk University Journals
10
National Institute of Polar Research Repository, Japan
10
Institute for Marine Research: Brage IMR
9
NTNU Open Archive (Norwegian University of Science and Technology)
9
Uppsala University: Publications (DiVA)
9
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca)
8
Bergen Open Access Publishing (University of Bergen Library)
7
Charles University CU Digital repository
7
Ghent University Academic Bibliography
7
HAL Lyon 1 (University Claude Bernard Lyon 1)
7
HighWire Press (Stanford University)
7
Norwegian Institute for Nature Research: Brage NINA
7
University of Calgary Journal Hosting
7
Université de Lyon: HAL
7
Aarhus University: Research
6
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
6
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