Content Provider
Directory of Open Access Journals: DOAJ Articles
105,984
DataCite Metadata Store (German National Library of Science and Technology)
38,128
Wiley Online Library
36,691
Springer Nature (via Crossref)
29,514
ScienceDirect (Elsevier - via Crossref)
28,837
Cambridge University Press
22,743
Unknown
22,305
ScienceDirect (Elsevier)
19,718
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
18,572
Informa (via Crossref)
14,686
Université de Nantes: HAL-UNIV-NANTES
11,614
Natural Environment Research Council: NERC Open Research Archive
11,023
Institut national des sciences de l'Univers: HAL-INSU
10,494
Niedersächsisches Online-Archiv NOA
9,688
LeibnizOpen (The Leibniz Association)
9,686
Wiley Online Library (via Crossref)
9,335
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
8,345
Canadian Science Publishing (via Crossref)
7,198
University of Copenhagen: Research
6,264
RePEc (Research Papers in Economics)
6,197
Oxford University Press (via Crossref)
6,083
University of California: eScholarship
6,028
Informa
5,576
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)
5,053
Oxford University Press
4,713
JSTOR (via Crossref)
4,679
University of Tromsø: Munin Open Research Archive
4,509
HAL Sorbonne Université
4,386
Arctic Institute of North America (via Crossref)
4,275
Canadian Science Publishing
4,260
eCite UTAS (University of Tasmania)
3,961
Frontiers (Publisher)
3,955
Biodiversity Heritage Library (BHL)
3,895
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3,885
Max Planck Society: MPG.PuRe
3,433
University of Southampton: e-Prints Soton
3,425
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
2,881
Hirsla - Landspítali University Hospital research archive
2,833
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
2,805
SAGE Publications (via Crossref)
2,799
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
2,740
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
2,643
Technical University of Denmark: DTU Orbit
2,625
IOP Publishing (via Crossref)
2,619
University of St Andrews: Research Portal
2,415
Lund University Publications (LUP)
2,307
more ...