Content Provider
Directory of Open Access Journals: DOAJ Articles
6,791
Natural Environment Research Council: NERC Open Research Archive
5,078
Springer Nature (via Crossref)
4,284
DataCite Metadata Store (German National Library of Science and Technology)
3,285
Unknown
2,756
ScienceDirect (Elsevier - via Crossref)
2,735
Cambridge University Press
2,566
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2,503
Université de Nantes: HAL-UNIV-NANTES
1,795
eCite UTAS (University of Tasmania)
1,705
Wiley Online Library
1,314
Niedersächsisches Online-Archiv NOA
1,217
LeibnizOpen (The Leibniz Association)
1,064
ScienceDirect (Elsevier)
1,021
University of Tasmania: UTas ePrints
967
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
926
Digital.CSIC (Spanish National Research Council)
810
Institut national des sciences de l'Univers: HAL-INSU
799
Informa (via Crossref)
740
University of California: eScholarship
729
University of Southampton: e-Prints Soton
657
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
619
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
605
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
489
Australian National University: ANU Digital Collections
483
University of St Andrews: Research Portal
438
JSTOR (via Crossref)
399
Vernadsky National Library of Ukraine: DSpace
383
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
367
The University of Queensland: UQ eSpace
335
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
321
Utrecht University Repository
318
Wiley Online Library (via Crossref)
312
Université Grenoble Alpes: HAL
306
Magnolia press
296
University of East Anglia: UEA Digital Repository
294
Max Planck Society: MPG.PuRe
271
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
260
Oxford University Press (via Crossref)
244
Arctic Portal Library
243
University College London: UCL Discovery
243
Northumbria University, Newcastle: Northumbria Research Link (NRL)
241
RePEc (Research Papers in Economics)
241
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
241
Università degli Studi di Genova: CINECA IRIS
225
Ghent University Academic Bibliography
208
Apollo - University of Cambridge Repository
207
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
201
University of Bristol: Bristol Research
198
White Rose Research Online (Universities of Leeds, Sheffield & York)
198
more ...