Content Provider
Directory of Open Access Journals: DOAJ Articles
111,897
Wiley Online Library
40,767
ScienceDirect (Elsevier - via Crossref)
28,642
Springer Nature (via Crossref)
27,011
Cambridge University Press
23,102
ScienceDirect (Elsevier)
19,658
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
17,495
Unknown
17,457
Université de Nantes: HAL-UNIV-NANTES
11,121
Institut national des sciences de l'Univers: HAL-INSU
10,650
DataCite Metadata Store (German National Library of Science and Technology)
10,277
Niedersächsisches Online-Archiv NOA
9,807
Informa (via Crossref)
9,600
LeibnizOpen (The Leibniz Association)
9,124
Informa
8,452
University of Copenhagen: Research
5,930
Oxford University Press
5,925
Canadian Science Publishing
5,879
Wiley Online Library (via Crossref)
5,815
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
5,180
University of Calgary Journal Hosting
5,137
Natural Environment Research Council: NERC Open Research Archive
5,057
Aarhus University: Research
4,931
Canadian Science Publishing (via Crossref)
4,856
DataCite
4,826
University of St Andrews: Research Portal
4,759
HAL Sorbonne Université
4,433
University of Tromsø: Munin Open Research Archive
4,236
eCite UTAS (University of Tasmania)
3,961
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3,716
Digital.CSIC (Spanish National Research Council)
3,481
Oxford University Press (via Crossref)
3,401
SAGE Publications
3,100
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
2,900
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
2,770
The Royal Society
2,715
Technical University of Denmark: DTU Orbit
2,695
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
2,508
HELDA – University of Helsinki Open Repository
2,442
Max Planck Society: MPG.PuRe
2,413
AAAS Resource Center (American Association for the Advancement of Science)
2,408
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
2,349
Lund University Publications (LUP)
2,303
Wageningen UR (University & Research Centre): Digital Library
2,260
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
2,203
Archives ouvertes de Paris-Saclay
2,155
University of Southampton: e-Prints Soton
2,100
Université Grenoble Alpes: HAL
2,015
PLOS
1,978
University of Groningen research database
1,958
more ...