Content Provider
Directory of Open Access Journals: DOAJ Articles
101,803
ScienceDirect (Elsevier - via Crossref)
36,001
Springer Nature (via Crossref)
27,011
Cambridge University Press
22,640
Wiley Online Library (via Crossref)
22,146
Wiley Online Library
20,540
Unknown
17,626
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
17,495
DataCite Metadata Store (German National Library of Science and Technology)
14,456
Informa (via Crossref)
13,316
ScienceDirect (Elsevier)
11,771
Université de Nantes: HAL-UNIV-NANTES
11,106
Institut national des sciences de l'Univers: HAL-INSU
10,419
Niedersächsisches Online-Archiv NOA
9,623
LeibnizOpen (The Leibniz Association)
8,689
Canadian Science Publishing (via Crossref)
7,159
University of Copenhagen: Research
5,827
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
5,128
University of Calgary Journal Hosting
5,119
Oxford University Press (via Crossref)
5,021
Natural Environment Research Council: NERC Open Research Archive
4,971
Aarhus University: Research
4,778
Informa
4,429
HAL Sorbonne Université
4,289
University of Tromsø: Munin Open Research Archive
4,156
Oxford University Press
4,097
eCite UTAS (University of Tasmania)
3,961
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3,619
Canadian Science Publishing
3,504
Digital.CSIC (Spanish National Research Council)
3,327
SAGE Publications (via Crossref)
2,877
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
2,851
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
2,719
Technical University of Denmark: DTU Orbit
2,563
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
2,508
University of St Andrews: Research Portal
2,387
Max Planck Society: MPG.PuRe
2,362
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
2,319
Lund University Publications (LUP)
2,266
Wageningen UR (University & Research Centre): Digital Library
2,198
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
2,161
Archives ouvertes de Paris-Saclay
2,075
University of Southampton: e-Prints Soton
2,056
Cambridge University Press (via Crossref)
2,028
Université Grenoble Alpes: HAL
1,980
University of Bristol: Bristol Research
1,918
University of Tromsø: Septentrio Academic Publishing
1,877
University of Groningen research database
1,848
HELDA – University of Helsinki Open Repository
1,794
University of Bergen: Bergen Open Research Archive (BORA-UiB)
1,760
more ...