Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
8,712
PANGAEA - Data Publisher for Earth & Environmental Science
301
Unknown
100
Directory of Open Access Journals: DOAJ Articles
68
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
66
University of Tromsø: Munin Open Research Archive
60
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
57
Aarhus University: Research
45
Copernicus Publications: E-Journals
31
Wiley Online Library (via Crossref)
29
Arctic Data Center (via DataONE)
27
Wiley Online Library
27
ScienceDirect (Elsevier - via Crossref)
25
Natural Environment Research Council: NERC Open Research Archive
24
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
23
Springer Nature (via Crossref)
23
Niedersächsisches Online-Archiv NOA
22
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
21
Zenodo
21
Institut national des sciences de l'Univers: HAL-INSU
16
PubMed Central (PMC)
15
University College London: UCL Discovery
15
University of Southampton: e-Prints Soton
15
ARPI - Archivio della Ricerca dell'Università di Pisa
14
Cambridge University Press
14
Canadian Science Publishing (via Crossref)
14
LeibnizOpen (The Leibniz Association)
13
Université de Nantes: HAL-UNIV-NANTES
13
Carleton University's Institutional Repository
12
CyberLeninka (Scientific Electronic Library)
11
Defense Technical Information Center: DTIC Technical Reports database
11
Frontiers: Figshare
11
Polar Research (E-Journal)
10
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
9
Durham University: Durham Research Online
9
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
9
Biodiversity Heritage Library (BHL)
8
Max Planck Society: MPG.PuRe
8
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
7
Portail des publications scientifiques de l’Université d’Angers (HAL)
7
Stockholm University: Publications (DiVA)
7
University of Tromsø: Septentrio Academic Publishing
7
EPHE (Ecole pratique des hautes études, Paris): HAL
6
Journals at the University of Arizona
6
Lund University Publications (LUP)
6
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
6
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences)
6
SAGE Publications (via Crossref)
6
University of Copenhagen: Research
6
Apollo - University of Cambridge Repository
5
more ...