Content Provider
Directory of Open Access Journals: DOAJ Articles
51,801
Unknown
5,085
ScienceDirect (Elsevier - via Crossref)
5,014
University of Calgary Journal Hosting
4,983
Springer Nature (via Crossref)
4,892
DataCite Metadata Store (German National Library of Science and Technology)
4,453
Arctic Institute of North America (via Crossref)
4,409
Informa (via Crossref)
4,201
Wiley Online Library (via Crossref)
3,085
LeibnizOpen (The Leibniz Association)
2,786
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2,739
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2,478
Niedersächsisches Online-Archiv NOA
2,413
Cambridge University Press
2,325
Wiley Online Library
2,116
University of Tromsø: Munin Open Research Archive
1,874
Aarhus University: Research
1,724
Informa
1,686
Université de Nantes: HAL-UNIV-NANTES
1,575
Canadian Science Publishing (via Crossref)
1,446
Institut national des sciences de l'Univers: HAL-INSU
1,364
ScienceDirect (Elsevier)
1,301
RePEc (Research Papers in Economics)
1,173
University of California: eScholarship
1,095
University of Copenhagen: Research
1,092
IOP Publishing (via Crossref)
1,076
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
980
Zenodo
948
Natural Environment Research Council: NERC Open Research Archive
929
Max Planck Society: MPG.PuRe
815
Oxford University Press (via Crossref)
802
JSTOR (via Crossref)
795
LaCRIS - University of Lapland Current Research System
672
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
650
Frontiers (Publisher)
608
HAL Sorbonne Université
602
National Research Council Canada: NRC Publications Archive
580
University of Bergen: Bergen Open Research Archive (BORA-UiB)
533
HELDA – University of Helsinki Open Repository
530
Canadian Science Publishing
517
Lund University Publications (LUP)
497
Technical University of Denmark: DTU Orbit
467
Arctic Institute of North America
465
SAGE Publications (via Crossref)
462
Digital.CSIC (Spanish National Research Council)
455
AAAS Resource Center (American Association for the Advancement of Science - via Crossref)
451
Polar Research (E-Journal)
445
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
436
Biodiversity Heritage Library (BHL)
433
University College London: UCL Discovery
416
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