Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,245
PANGAEA - Data Publisher for Earth & Environmental Science
622
Zenodo
488
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
451
Natural Environment Research Council: NERC Open Research Archive
272
Directory of Open Access Journals: DOAJ Articles
220
Unknown
190
Copernicus Publications: E-Journals
119
Digital.CSIC (Spanish National Research Council)
106
Cambridge University Press
93
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
85
Niedersächsisches Online-Archiv NOA
82
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
79
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
66
LeibnizOpen (The Leibniz Association)
63
Institut national des sciences de l'Univers: HAL-INSU
61
eCite UTAS (University of Tasmania)
57
University of Southampton: e-Prints Soton
50
Springer Nature (via Crossref)
45
Université de Nantes: HAL-UNIV-NANTES
45
University of East Anglia: UEA Digital Repository
42
Research Data Australia (Australian National Data Service - ANDS)
40
PubMed Central (PMC)
35
HAL Sorbonne Université
34
University of Groningen research database
33
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
30
Wiley Online Library (via Crossref)
29
Caltech Authors (California Institute of Technology)
28
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
27
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
26
University of Tasmania: UTas ePrints
26
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
25
Muséum National d'Histoire Naturelle (MNHM): HAL
25
MDPI Open Access Publishing
23
Magnolia press
23
National Institute of Polar Research Repository, Japan
23
ScienceDirect (Elsevier - via Crossref)
23
Wiley Online Library
23
École Polytechnique, Université Paris-Saclay: HAL
23
Archives ouvertes de Paris-Saclay
22
Université de Paris: Portail HAL
22
University of Liège: ORBi (Open Repository and Bibliography)
21
NASA Technical Reports Server (NTRS)
20
Wageningen UR (University & Research Centre): Digital Library
20
DIAL@USL-B (Université Saint-Louis, Bruxelles)
19
Frontiers: Figshare
19
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
18
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
18
Defense Technical Information Center: DTIC Technical Reports database
18
Ghent University Academic Bibliography
18
more ...