Content Provider
Directory of Open Access Journals: DOAJ Articles
1,001
Cambridge University Press
455
Unknown
406
DataCite Metadata Store (German National Library of Science and Technology)
291
Wiley Online Library
282
Niedersächsisches Online-Archiv NOA
274
LeibnizOpen (The Leibniz Association)
231
ScienceDirect (Elsevier - via Crossref)
173
Aarhus University: Research
171
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
171
University of California: eScholarship
162
Wiley Online Library (via Crossref)
160
University of Copenhagen: Research
148
Institut national des sciences de l'Univers: HAL-INSU
126
Université de Nantes: HAL-UNIV-NANTES
124
Informa (via Crossref)
121
University of Bristol: Bristol Research
110
University of St Andrews: Research Portal
110
White Rose Research Online (Universities of Leeds, Sheffield & York)
109
Natural Environment Research Council: NERC Open Research Archive
102
Technical University of Denmark: DTU Orbit
102
Utrecht University Repository
99
Springer Nature (via Crossref)
90
Durham University: Durham Research Online
88
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
81
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
80
Caltech Authors (California Institute of Technology)
78
University of St Andrews: Digital Research Repository
71
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
68
SAGE Publications
67
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
65
University of Calgary Journal Hosting
62
Polar Research (E-Journal)
61
University of Tromsø: Munin Open Research Archive
59
Apollo - University of Cambridge Repository
57
Informa
57
Frontiers (Publisher)
56
The University of Manchester: Research Explorer
53
RePEc (Research Papers in Economics)
51
SAGE Publications (via Crossref)
51
ETH Zürich Research Collection
46
Swansea University: Cronfa
46
University of Bergen: Bergen Open Research Archive (BORA-UiB)
45
Zenodo
45
University of Liège: ORBi (Open Repository and Bibliography)
44
University of Glasgow: Enlighten - Publications
43
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
42
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
41
Opin vísindi (Iceland)
39
The University of Kansas: KU ScholarWorks
39
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