Content Provider
RePEc (Research Papers in Economics)
55
LeibnizOpen (The Leibniz Association)
43
DataCite Metadata Store (German National Library of Science and Technology)
24
IOP Publishing
21
SSOAR - Social Science Open Access Repository
15
Zenodo
12
Kazan Federal University Digital Repository
11
NORA (National aggregator of open repositories of Russian universities)
11
UEF eRepository (University of Eastern Finland)
11
Federation of Finnish Learned Societies: Scientific Journals Online
9
DataCite
8
Australian National University: ANU Digital Collections
7
Curtin University: espace
7
Brill (via Crossref)
6
Unknown
6
Caltech Authors (California Institute of Technology)
5
Frontiers (Publisher)
5
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
5
JSTOR (via Crossref)
5
Sciendo (de Gruyter - via CrossRef)
5
Cardiff University: ORCA (Online Research @ Cardiff)
4
Åbo Akademi University Research Portal
4
De Gruyter (via Crossref)
3
Digital.CSIC (Spanish National Research Council)
3
Indian Academy of Sciences: Publication of Fellows
3
LiU Electronic Press (Linköping University)
3
Munipress - Masaryk University Press
3
South Ural State University: Electronic Archive
3
Brill
2
De Gruyter
2
JSTOR
2
Max Planck Society: MPG.PuRe
2
Oxford University Press
2
Springer Nature (via Crossref)
2
University College London: UCL Discovery
2
University of California: eScholarship
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
BIROn - Birkbeck Institutional Research Online (Birkbeck University of London)
1
Biodiversity Heritage Library (BHL)
1
Canadian Science Publishing
1
Czech Academy of Sciences: dKNAV
1
DRO - Deakin Research Online
1
Equinox Publishing
1
Geological Quarterly
1
Helmholtz Centre of Infection Research (HZI), Braunschweig: Repository
1
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
1
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository)
1
Indiana University: Digital Library of the Commons (DLC)
1
Institute of Slavic Studies, Polish Academy of Sciences: iReteslaw
1
Kingston University London: Research Repository
1
more ...