Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
22,435
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
8,295
RePEc (Research Papers in Economics)
6,197
Natural Environment Research Council: NERC Open Research Archive
6,036
JSTOR (via Crossref)
4,413
Arctic Institute of North America (via Crossref)
4,409
University of California: eScholarship
4,351
Zenodo
4,075
Biodiversity Heritage Library (BHL)
3,895
Frontiers (Publisher)
3,884
IOP Publishing (via Crossref)
2,689
Springer Nature (via Crossref)
2,066
Informa (via Crossref)
1,687
Dryad Digital Repository (Duke University)
1,666
Australian National University: ANU Digital Collections
1,659
Caltech Authors (California Institute of Technology)
1,560
Digital.CSIC (Spanish National Research Council)
1,503
Oxford University Press (via Crossref)
1,376
University of Southampton: e-Prints Soton
1,369
Brill (via Crossref)
1,291
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1,159
Unknown
1,118
Max Planck Society: MPG.PuRe
1,027
University College London: UCL Discovery
951
LeibnizOpen (The Leibniz Association)
935
University of Glasgow: Enlighten - Publications
911
Durham University: Durham Research Online
910
IOP Publishing
858
University of East Anglia: UEA Digital Repository
830
De Gruyter (via Crossref)
763
James Cook University, Australia: ResearchOnline@JCU
723
Informa
701
e-periodica (Swiss journals online, ETH Zurich)
685
University of Tasmania: UTas ePrints
645
University of Toronto: Research Repository T-Space
584
ScholarsArchive@OSU (Oregon State University)
554
NORA (National aggregator of open repositories of Russian universities)
552
Digital Commons University of South Florida (USF)
544
University of South Florida St. Petersburg: Digital USFSP
544
Cardiff University: ORCA (Online Research @ Cardiff)
531
JSTOR
531
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
530
Curtin University: espace
524
CentAUR: Central Archive at the University of Reading
522
The Open University: Open Research Online (ORO)
511
ORA - Oxford University Research Archive
488
IEEE Publications
478
Wiley Online Library
467
Arctic Institute of North America
465
IEEE Publications (via Crossref)
462
more ...