Content Provider
University of Calgary Journal Hosting
971
Directory of Open Access Journals: DOAJ Articles
953
Arctic Institute of North America (via Crossref)
431
DataCite Metadata Store (German National Library of Science and Technology)
374
Wiley Online Library
323
Unknown
249
University of California: eScholarship
199
Wiley Online Library (via Crossref)
197
Informa (via Crossref)
183
Niedersächsisches Online-Archiv NOA
173
Cambridge University Press
158
LeibnizOpen (The Leibniz Association)
122
Canadian Science Publishing (via Crossref)
117
Informa
107
Arctic Institute of North America
96
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
94
Springer Nature (via Crossref)
84
Canadian Science Publishing
82
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
81
RePEc (Research Papers in Economics)
74
Université de Nantes: HAL-UNIV-NANTES
62
ScienceDirect (Elsevier - via Crossref)
53
Institut national des sciences de l'Univers: HAL-INSU
52
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
48
University of Wisconsin Press (UW Press - via Crossref)
48
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
47
IOP Publishing
45
Oxford University Press (via Crossref)
40
ScienceDirect (Elsevier)
39
University of Alaska: ScholarWorks@UA
37
University of Tromsø: Septentrio Academic Publishing
36
Aarhus University: Research
35
Frontiers (Publisher)
35
JSTOR (via Crossref)
32
University of Copenhagen: Research
32
Wageningen UR (University & Research Centre): Digital Library
32
Cambridge University Press (via Crossref)
29
University of North Texas: UNT Digital Library
28
Dryad Digital Repository (Duke University)
27
Oxford University Press
27
University of Tromsø: Munin Open Research Archive
27
Lund University Publications (LUP)
26
Max Planck Society: MPG.PuRe
26
Biodiversity Heritage Library (BHL)
25
HAL Sorbonne Université
25
Jultika - University of Oulu repository
24
University of Michigan: Deep Blue
22
Zenodo
21
AAAS Resource Center (American Association for the Advancement of Science - via Crossref)
20
SAGE Publications (via Crossref)
20
more ...