Content Provider
Directory of Open Access Journals: DOAJ Articles
6,669
Unknown
6,636
DataCite Metadata Store (German National Library of Science and Technology)
4,745
Springer Nature (via Crossref)
3,888
Ohio State University (OSU): Knowledge Bank
3,280
PANGAEA - Data Publisher for Earth & Environmental Science
2,940
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2,892
ScienceDirect (Elsevier - via Crossref)
2,718
eCite UTAS (University of Tasmania)
2,572
Cambridge University Press
2,566
PubMed Central (PMC)
2,480
National Institute of Polar Research Repository, Japan
2,354
Natural Environment Research Council: NERC Open Research Archive
2,154
Université de Nantes: HAL-UNIV-NANTES
2,074
Copernicus Publications: E-Journals
1,899
LeibnizOpen (The Leibniz Association)
1,340
Wiley Online Library
1,338
Niedersächsisches Online-Archiv NOA
1,217
University of Tasmania: UTas ePrints
1,049
ScienceDirect (Elsevier)
1,019
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
937
Institut national des sciences de l'Univers: HAL-INSU
930
MDPI Open Access Publishing
911
Defense Technical Information Center: DTIC Technical Reports database
834
Informa (via Crossref)
713
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
677
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
650
Digital.CSIC (Spanish National Research Council)
643
University of Canterbury, Christchurch: UC Research Repository
614
HighWire Press (Stanford University)
580
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
527
University of Southampton: e-Prints Soton
525
University of St Andrews: Research Portal
467
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
416
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
402
Università degli Studi di Genova: CINECA IRIS
398
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
378
Utrecht University Repository
377
Université Grenoble Alpes: HAL
372
The University of Queensland: UQ eSpace
364
University of California: eScholarship
327
Magnolia press
296
Apollo - University of Cambridge Repository
284
Ghent University Academic Bibliography
281
Wiley Online Library (via Crossref)
274
Hathi Trust Digital Library
269
DIAL@USL-B (Université Saint-Louis, Bruxelles)
262
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
256
Arctic Portal Library
250
Università degli Studi di Siena: USiena air
244
more ...