Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
85
DataCite Metadata Store (German National Library of Science and Technology)
56
Directory of Open Access Journals: DOAJ Articles
18
University of Calgary Journal Hosting
15
Springer Nature
14
Lund University Publications (LUP)
11
Unknown
11
Wiley Online Library
10
University of Potsdam: publish.UP
8
Copernicus Publications: E-Journals
6
NORA (National aggregator of open repositories of Russian universities)
5
Polar Research (E-Journal)
5
Siberian Federal University: Archiv Elektronnych SFU
5
Cambridge University Press
4
Cologne University: KUPS
4
Magnolia press
4
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
4
Springer Nature (via Crossref)
4
Arctic Institute of North America
3
Geography, Environment, Sustainability (E-Journal)
3
Kazan Federal University Digital Repository
3
Niedersächsisches Online-Archiv NOA
3
Pensoft Publishers
3
Aarhus University: Research
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2
Australian National University: ANU Digital Collections
2
KOPS - The Institutional Repository of the University of Konstanz
2
MDPI Open Access Publishing
2
PubMed Central (PMC)
2
ScienceDirect (Elsevier - via Crossref)
2
University of Groningen research database
2
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
2
Vegetable crops of Russia (E-Journal)
2
Wiley Online Library (via Crossref)
2
ArXiv.org (Cornell University Library)
1
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
1
Carolina Digital Repository (UNC - University of North Carolina)
1
Chalmers University of Technology: Chalmers research
1
CyberLeninka (Scientific Electronic Library)
1
Defense Technical Information Center: DTIC Technical Reports database
1
ETH Zürich Research Collection
1
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
German Aerospace Center: elib - DLR electronic library
1
King's College, London: Research Portal
1
LaCRIS - University of Lapland Current Research System
1
Lund University Publications Student Papers (LUP-SP)
1
NTNU Open Archive (Norwegian University of Science and Technology)
1
National Institute of Polar Research Repository, Japan
1
RePEc (Research Papers in Economics)
1
Russian Journal of Infection and Immunity (Infektsiya i immunitet)
1
more ...