Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
796
Directory of Open Access Journals: DOAJ Articles
572
Unknown
406
Natural Environment Research Council: NERC Open Research Archive
357
PANGAEA - Data Publisher for Earth & Environmental Science
301
Cambridge University Press
229
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
168
PubMed Central (PMC)
161
Copernicus Publications: E-Journals
159
Springer Nature (via Crossref)
141
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
122
Niedersächsisches Online-Archiv NOA
107
ScienceDirect (Elsevier - via Crossref)
101
Digital.CSIC (Spanish National Research Council)
100
MDPI Open Access Publishing
89
eCite UTAS (University of Tasmania)
81
Université de Nantes: HAL-UNIV-NANTES
73
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
64
Utrecht University Repository
62
HighWire Press (Stanford University)
53
National Institute of Polar Research Repository, Japan
48
University of Southampton: e-Prints Soton
48
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
47
Institut national des sciences de l'Univers: HAL-INSU
40
LeibnizOpen (The Leibniz Association)
39
University of Tasmania: UTas ePrints
39
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
37
ScienceDirect (Elsevier)
35
Universidad de Chile: Repositorio académico
35
White Rose Research Online (Universities of Leeds, Sheffield & York)
35
Apollo - University of Cambridge Repository
32
University of California: eScholarship
32
University of Freiburg: FreiDok
31
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
28
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
27
Magnolia press
25
Ghent University Academic Bibliography
24
HAL Sorbonne Université
20
OpenAgrar (OA)
20
The Royal Society (via Crossref)
20
University of Alberta: Era - Education and Research Archive
20
University of East Anglia: UEA Digital Repository
20
Wiley Online Library (via Crossref)
20
DIAL@USL-B (Université Saint-Louis, Bruxelles)
19
Universidade de Lisboa: repositório.UL
19
University of Groningen research database
19
Northumbria University, Newcastle: Northumbria Research Link (NRL)
18
University of Bristol: Bristol Research
18
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
17
Polar Research (E-Journal)
17
more ...