Content Provider
University of Washington, Seattle: Digital Collections
6,050
DataCite Metadata Store (German National Library of Science and Technology)
2,569
Open Parks Network
1,852
Arctic Data Center (via DataONE)
1,690
Directory of Open Access Journals: DOAJ Articles
1,001
Unknown
913
University of the Pacific, McGeorge School of Law: Scholarly Commons
553
University of the Pacific: Scholarly Commons
551
Cambridge University Press
455
University of Michigan: Digital Collections
422
Copernicus Publications: E-Journals
416
Zenodo
321
Wiley Online Library
295
PANGAEA - Data Publisher for Earth & Environmental Science
283
Niedersächsisches Online-Archiv NOA
274
LeibnizOpen (The Leibniz Association)
272
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
265
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
261
University of California: eScholarship
194
Université de Nantes: HAL-UNIV-NANTES
193
Aarhus University: Research
189
University of Copenhagen: Research
182
Washington State University: WSU Libraries Digital Collections
181
Institut national des sciences de l'Univers: HAL-INSU
176
ScienceDirect (Elsevier - via Crossref)
176
Wiley Online Library (via Crossref)
160
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
146
Technical University of Denmark: DTU Orbit
145
PubMed Central (PMC)
144
University of Alaska: ScholarWorks@UA
143
Frontiers: Figshare
138
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
126
Informa (via Crossref)
125
Utrecht University Repository
121
Natural Environment Research Council: NERC Open Research Archive
120
MDPI Open Access Publishing
119
University of St Andrews: Research Portal
112
University of Bristol: Bristol Research
111
White Rose Research Online (Universities of Leeds, Sheffield & York)
110
Springer Nature (via Crossref)
107
USGS Science Data Catalog (via DataONE)
107
Apollo - University of Cambridge Repository
98
University of Tromsø: Munin Open Research Archive
94
Durham University: Durham Research Online
88
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
83
University of Bergen: Bergen Open Research Archive (BORA-UiB)
83
Caltech Authors (California Institute of Technology)
82
Skemman (Iceland)
78
University of St Andrews: Digital Research Repository
75
German Aerospace Center: elib - DLR electronic library
74
more ...