Content Provider
Directory of Open Access Journals: DOAJ Articles
51,886
Unknown
5,094
ScienceDirect (Elsevier - via Crossref)
5,014
University of Calgary Journal Hosting
4,983
Springer Nature (via Crossref)
4,894
DataCite Metadata Store (German National Library of Science and Technology)
4,700
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)
2,480
Niedersächsisches Online-Archiv NOA
2,418
Wiley Online Library
2,405
Cambridge University Press
2,358
University of Tromsø: Munin Open Research Archive
1,918
Aarhus University: Research
1,736
Informa
1,706
Université de Nantes: HAL-UNIV-NANTES
1,581
Institut national des sciences de l'Univers: HAL-INSU
1,534
Canadian Science Publishing (via Crossref)
1,446
ScienceDirect (Elsevier)
1,301
RePEc (Research Papers in Economics)
1,173
University of Copenhagen: Research
1,169
University of California: eScholarship
1,102
IOP Publishing (via Crossref)
1,076
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
980
Zenodo
950
Natural Environment Research Council: NERC Open Research Archive
930
Max Planck Society: MPG.PuRe
815
Oxford University Press (via Crossref)
806
JSTOR (via Crossref)
795
HAL Sorbonne Université
695
LaCRIS - University of Lapland Current Research System
690
Frontiers (Publisher)
673
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
656
National Research Council Canada: NRC Publications Archive
580
Canadian Science Publishing
568
HELDA – University of Helsinki Open Repository
533
University of Bergen: Bergen Open Research Archive (BORA-UiB)
533
Technical University of Denmark: DTU Orbit
526
Lund University Publications (LUP)
511
Oxford University Press
475
Digital.CSIC (Spanish National Research Council)
466
Arctic Institute of North America
465
SAGE Publications (via Crossref)
462
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)
434
more ...