Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
3,236
Arctic Data Center (via DataONE)
1,661
Directory of Open Access Journals: DOAJ Articles
854
Unknown
799
Wiley Online Library
681
Dryad Digital Repository (Duke University)
504
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
421
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
368
Zenodo
282
University of Calgary Journal Hosting
260
PubMed Central (PMC)
257
PANGAEA - Data Publisher for Earth & Environmental Science
242
University of California: eScholarship
205
Copernicus Publications: E-Journals
196
Springer Nature (via Crossref)
188
Aarhus University: Research
172
University of Copenhagen: Research
168
Informa (via Crossref)
165
Lund University Publications (LUP)
158
University of Tromsø: Munin Open Research Archive
154
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
141
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE)
136
MDPI Open Access Publishing
135
Wageningen UR (University & Research Centre): Digital Library
127
Niedersächsisches Online-Archiv NOA
126
Canadian Science Publishing (via Crossref)
119
IOP Publishing
106
Université de Nantes: HAL-UNIV-NANTES
99
Informa
94
Wiley Online Library (via Crossref)
91
Arctic Institute of North America
87
The University of Utah: J. Willard Marriott Digital Library
87
Canadian Science Publishing
84
Defense Technical Information Center: DTIC Technical Reports database
83
LeibnizOpen (The Leibniz Association)
83
Cambridge University Press
78
LaCRIS - University of Lapland Current Research System
77
HELDA – University of Helsinki Open Repository
75
ScienceDirect (Elsevier - via Crossref)
73
Umeå University: Publications (DiVA)
72
University of Alaska: ScholarWorks@UA
70
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
68
Institut national des sciences de l'Univers: HAL-INSU
66
University of Groningen research database
64
Max Planck Society: MPG.PuRe
63
CyberLeninka (Scientific Electronic Library)
60
Queen's University, Ontario: QSpace
57
Vrije Universiteit Amsterdam (VU): Research Portal
55
University of North Texas: UNT Digital Library
53
Jultika - University of Oulu repository
52
more ...