Content Provider
LeibnizOpen (The Leibniz Association)
156
Directory of Open Access Journals: DOAJ Articles
133
Copernicus Publications: E-Journals
82
DataCite Metadata Store (German National Library of Science and Technology)
81
Unknown
71
Niedersächsisches Online-Archiv NOA
65
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
52
Skemman (Iceland)
44
German Aerospace Center: elib - DLR electronic library
41
Université de Genève: Archive ouverte UNIGE
39
Institut national des sciences de l'Univers: HAL-INSU
36
ScienceDirect (Elsevier - via Crossref)
32
Université de Nantes: HAL-UNIV-NANTES
32
University of Bristol: Bristol Research
29
Springer Nature (via Crossref)
28
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
25
KITopen (Karlsruhe Institute of Technologie)
24
MDPI Open Access Publishing
22
PubMed Central (PMC)
22
Wiley Online Library
21
ORA - Oxford University Research Archive
20
WikiBooks - Open-content textbooks
20
Opin vísindi (Iceland)
19
RePEc (Research Papers in Economics)
19
Zenodo
19
Natural Environment Research Council: NERC Open Research Archive
18
ScienceDirect (Elsevier)
18
Université de Lyon: HAL
18
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
15
CentAUR: Central Archive at the University of Reading
14
HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne)
13
HAL Sorbonne Université
12
Université Jean Monnet – Saint-Etienne: HAL
12
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
12
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
11
DataCite
10
Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge
10
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
9
Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX)
9
University of Southampton: e-Prints Soton
9
Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources)
8
HighWire Press (Stanford University)
8
PANGAEA - Data Publisher for Earth & Environmental Science
8
Université de Paris: Portail HAL
8
ARPI - Archivio della Ricerca dell'Università di Pisa
7
Cambridge University Press
7
Durham University: Durham Research Online
7
Hirsla - Landspítali University Hospital research archive
7
Lancaster University: Lancaster Eprints
7
Max Planck Society: MPG.PuRe
7
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