Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
2,248
Directory of Open Access Journals: DOAJ Articles
2,136
Unknown
1,210
Wiley Online Library
562
PubMed Central (PMC)
527
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
426
Copernicus Publications: E-Journals
407
Aarhus University: Research
376
LeibnizOpen (The Leibniz Association)
370
MDPI Open Access Publishing
369
University of Tromsø: Munin Open Research Archive
340
Université de Nantes: HAL-UNIV-NANTES
293
Institut national des sciences de l'Univers: HAL-INSU
266
Niedersächsisches Online-Archiv NOA
256
PANGAEA - Data Publisher for Earth & Environmental Science
242
University of Copenhagen: Research
234
Springer Nature (via Crossref)
206
Zenodo
202
Wiley Online Library (via Crossref)
192
University of Calgary Journal Hosting
191
Defense Technical Information Center: DTIC Technical Reports database
170
LaCRIS - University of Lapland Current Research System
156
Lund University Publications (LUP)
150
HELDA – University of Helsinki Open Repository
143
Arctic Council Repository
133
HAL Sorbonne Université
127
Wageningen UR (University & Research Centre): Digital Library
126
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
112
Umeå University: Publications (DiVA)
105
University of Alaska: ScholarWorks@UA
104
Cambridge University Press
100
Archives ouvertes de Paris-Saclay
97
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
96
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
94
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
94
Natural Environment Research Council: NERC Open Research Archive
91
NTNU Open Archive (Norwegian University of Science and Technology)
90
University of Bergen: Bergen Open Research Archive (BORA-UiB)
85
University of California: eScholarship
81
White Rose Research Online (Universities of Leeds, Sheffield & York)
79
Jultika - University of Oulu repository
78
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
77
University of North Texas: UNT Digital Library
76
Theses Canada/Thèses Canada (Library and Archives Canada)
75
Vrije Universiteit Amsterdam (VU): Research Portal
75
Institute for Marine Research: Brage IMR
73
University of Groningen research database
68
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
68
Polar Research (E-Journal)
67
Canadian Science Publishing (via Crossref)
66
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