Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
13,087
Unknown
1,036
Directory of Open Access Journals: DOAJ Articles
973
Wiley Online Library
653
ScienceDirect (Elsevier - via Crossref)
494
Springer Nature (via Crossref)
471
Wiley Online Library (via Crossref)
451
University of Michigan: Digital Collections
442
Open Parks Network
425
PubMed Central (PMC)
404
Zenodo
395
Arctic Data Center (via DataONE)
326
Canadian Science Publishing (via Crossref)
263
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
226
PANGAEA - Data Publisher for Earth & Environmental Science
216
Informa (via Crossref)
208
University of Calgary Journal Hosting
190
Copernicus Publications: E-Journals
187
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
178
University of Copenhagen: Research
177
Lund University Publications (LUP)
168
MDPI Open Access Publishing
168
Defense Technical Information Center: DTIC Technical Reports database
166
ScienceDirect (Elsevier)
164
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
154
University of Tromsø: Munin Open Research Archive
150
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
143
CyberLeninka (Scientific Electronic Library)
141
Frontiers: Figshare
139
Université de Nantes: HAL-UNIV-NANTES
135
Niedersächsisches Online-Archiv NOA
134
University of Alaska: ScholarWorks@UA
134
HighWire Press (Stanford University)
123
Institut national des sciences de l'Univers: HAL-INSU
121
Natural Resources Institute Finland: Jukuri
117
Aarhus University: Research
115
HELDA – University of Helsinki Open Repository
112
Cambridge University Press
107
Oxford University Press (via Crossref)
105
Canadian Science Publishing
100
Theses Canada/Thèses Canada (Library and Archives Canada)
99
Umeå University: Publications (DiVA)
92
Biological and Chemical Oceanography Data Management Office (BCO-DMO) (via DataONE)
89
RePEc (Research Papers in Economics)
85
Arctic Institute of North America (via Crossref)
83
JSTOR (via Crossref)
81
University of California: eScholarship
76
Frontiers (Publisher)
75
Informa
75
ScholarsArchive@OSU (Oregon State University)
72
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