Content Provider
Directory of Open Access Journals: DOAJ Articles
51,088
PANGAEA - Data Publisher for Earth & Environmental Science
25,868
DataCite Metadata Store (German National Library of Science and Technology)
21,738
Unknown
11,830
ScienceDirect (Elsevier - via Crossref)
4,997
University of Calgary Journal Hosting
4,961
Springer Nature (via Crossref)
4,593
PubMed Central (PMC)
3,864
Defense Technical Information Center: DTIC Technical Reports database
3,556
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
3,552
Copernicus Publications: E-Journals
3,550
Open Parks Network
3,531
LeibnizOpen (The Leibniz Association)
3,113
Wiley Online Library (via Crossref)
3,020
Informa (via Crossref)
2,745
University of Tromsø: Munin Open Research Archive
2,543
Niedersächsisches Online-Archiv NOA
2,413
Aarhus University: Research
2,408
Cambridge University Press
2,325
Université de Nantes: HAL-UNIV-NANTES
2,057
Wiley Online Library
2,043
MDPI Open Access Publishing
1,990
Arctic Council Repository
1,922
Institut national des sciences de l'Univers: HAL-INSU
1,631
University of Copenhagen: Research
1,501
Canadian Science Publishing (via Crossref)
1,392
LaCRIS - University of Lapland Current Research System
1,390
ScienceDirect (Elsevier)
1,301
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1,177
Zenodo
1,151
Biodiversity Heritage Library (BHL)
1,142
Informa
1,103
Hathi Trust Digital Library
1,046
Technical University of Denmark: DTU Orbit
938
NTNU Open Archive (Norwegian University of Science and Technology)
865
HAL Sorbonne Université
806
University of Alaska: ScholarWorks@UA
760
Max Planck Society: MPG.PuRe
746
Institute for Marine Research: Brage IMR
714
National Institute of Polar Research Repository, Japan
703
University of Bergen: Bergen Open Research Archive (BORA-UiB)
700
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
692
HighWire Press (Stanford University)
663
University of North Texas: UNT Digital Library
661
Oxford University Press (via Crossref)
648
Arctic Portal Library
643
Lund University Publications (LUP)
622
Natural Environment Research Council: NERC Open Research Archive
618
HELDA – University of Helsinki Open Repository
576
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
576
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