Content Provider
Directory of Open Access Journals: DOAJ Articles
105,984
DataCite Metadata Store (German National Library of Science and Technology)
38,316
Wiley Online Library
37,314
Springer Nature (via Crossref)
29,514
ScienceDirect (Elsevier - via Crossref)
28,837
Cambridge University Press
22,752
Unknown
22,286
ScienceDirect (Elsevier)
19,718
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
18,572
Informa (via Crossref)
14,419
Université de Nantes: HAL-UNIV-NANTES
11,614
Natural Environment Research Council: NERC Open Research Archive
11,036
Institut national des sciences de l'Univers: HAL-INSU
10,494
Niedersächsisches Online-Archiv NOA
9,722
LeibnizOpen (The Leibniz Association)
9,686
Wiley Online Library (via Crossref)
8,831
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
8,390
Canadian Science Publishing (via Crossref)
7,189
University of Copenhagen: Research
6,271
RePEc (Research Papers in Economics)
6,197
University of California: eScholarship
6,032
Oxford University Press (via Crossref)
5,992
Informa
5,862
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
5,469
Aarhus University: Research
5,218
Zenodo
5,173
University of Calgary Journal Hosting
5,145
Digital.CSIC (Spanish National Research Council)
5,086
Arctic Institute of North America
4,887
Oxford University Press
4,819
University of Tromsø: Munin Open Research Archive
4,511
HAL Sorbonne Université
4,392
Canadian Science Publishing
4,269
eCite UTAS (University of Tasmania)
3,961
Frontiers (Publisher)
3,955
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3,897
Biodiversity Heritage Library (BHL)
3,895
JSTOR (via Crossref)
3,803
IOP Publishing
3,613
Max Planck Society: MPG.PuRe
3,433
University of Southampton: e-Prints Soton
3,429
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
2,882
Hirsla - Landspítali University Hospital research archive
2,833
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
2,805
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
2,748
The Royal Society
2,690
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
2,643
Technical University of Denmark: DTU Orbit
2,630
University of St Andrews: Research Portal
2,417
Caltech Authors (California Institute of Technology)
2,340
more ...