Content Provider
Directory of Open Access Journals: DOAJ Articles
718
DataCite Metadata Store (German National Library of Science and Technology)
671
Unknown
600
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
410
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
331
Copernicus Publications: E-Journals
272
Université de Nantes: HAL-UNIV-NANTES
210
PANGAEA - Data Publisher for Earth & Environmental Science
207
eCite UTAS (University of Tasmania)
203
Niedersächsisches Online-Archiv NOA
190
National Institute of Polar Research Repository, Japan
187
Natural Environment Research Council: NERC Open Research Archive
146
PubMed Central (PMC)
139
Zenodo
134
Institut national des sciences de l'Univers: HAL-INSU
128
ScienceDirect (Elsevier - via Crossref)
112
Springer Nature (via Crossref)
101
Cambridge University Press
95
Wiley Online Library (via Crossref)
95
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
85
University of Tasmania: UTas ePrints
84
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
76
Digital.CSIC (Spanish National Research Council)
70
MDPI Open Access Publishing
68
HighWire Press (Stanford University)
66
LeibnizOpen (The Leibniz Association)
57
Wiley Online Library
57
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
53
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
53
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
50
HAL Sorbonne Université
49
Defense Technical Information Center: DTIC Technical Reports database
45
University of Southampton: e-Prints Soton
45
theses.fr
42
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
40
ScienceDirect (Elsevier)
39
University of St Andrews: Research Portal
38
University of Groningen research database
37
IRD (Institute de recherche pour le développement): Horizon
36
Università degli Studi di Genova: CINECA IRIS
36
Arctic Portal Library
34
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
30
University of California: eScholarship
29
Université de Bretagne Occidentale: HAL
28
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
27
Inta Digital (ID - Instituto Nacional de Tecnología Agropecuaria)
27
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
22
Universidad de Chile: Repositorio académico
22
University of Cape Town: OpenUCT
22
Caltech Authors (California Institute of Technology)
21
more ...