Content Provider
Open Parks Network
1,845
DataCite Metadata Store (German National Library of Science and Technology)
1,054
Directory of Open Access Journals: DOAJ Articles
981
Unknown
774
University of the Pacific, McGeorge School of Law: Scholarly Commons
515
University of the Pacific: Scholarly Commons
513
Cambridge University Press
461
Copernicus Publications: E-Journals
416
Wiley Online Library
302
PANGAEA - Data Publisher for Earth & Environmental Science
297
Niedersächsisches Online-Archiv NOA
279
LeibnizOpen (The Leibniz Association)
272
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
241
Aarhus University: Research
184
University of Copenhagen: Research
182
Université de Nantes: HAL-UNIV-NANTES
173
Washington State University: WSU Libraries Digital Collections
171
Institut national des sciences de l'Univers: HAL-INSU
167
PubMed Central (PMC)
144
Technical University of Denmark: DTU Orbit
144
ScienceDirect (Elsevier - via Crossref)
140
Wiley Online Library (via Crossref)
139
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
121
MDPI Open Access Publishing
119
University of St Andrews: Research Portal
116
Utrecht University Repository
115
University of Alaska: ScholarWorks@UA
110
University of Bristol: Bristol Research
110
White Rose Research Online (Universities of Leeds, Sheffield & York)
105
University of Tromsø: Munin Open Research Archive
95
Zenodo
95
Apollo - University of Cambridge Repository
90
SAGE Publications
85
Springer Nature (via Crossref)
84
Informa (via Crossref)
76
University of St Andrews: Digital Research Repository
75
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
75
Natural Environment Research Council: NERC Open Research Archive
74
University of California: eScholarship
73
National Institute of Polar Research Repository, Japan
71
University of Bergen: Bergen Open Research Archive (BORA-UiB)
68
ETH Zürich Research Collection
63
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
63
University of Calgary Journal Hosting
62
Uppsala University: Publications (DiVA)
62
Polar Research (E-Journal)
61
The University of Manchester: Research Explorer
61
Informa
60
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
59
ScienceDirect (Elsevier)
56
more ...