Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
66
Directory of Open Access Journals: DOAJ Articles
63
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
35
Cambridge University Press
33
Digital.CSIC (Spanish National Research Council)
28
PANGAEA - Data Publisher for Earth & Environmental Science
28
Unknown
26
Natural Environment Research Council: NERC Open Research Archive
23
Wiley Online Library
22
PubMed Central (PMC)
19
MDPI Open Access Publishing
13
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
11
Ghent University Academic Bibliography
11
Universidade de Lisboa: repositório.UL
11
National Institute of Polar Research Repository, Japan
10
Universidad de Las Palmas de Gran Canaria: Acceda
10
Universidad de Chile: Repositorio académico
9
Dipòsit Digital de la Universitat de Barcelona
8
ScienceDirect (Elsevier - via Crossref)
8
Springer Nature (via Crossref)
8
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
8
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
7
Copernicus Publications: E-Journals
5
Masaryk University Journals
5
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
5
OpenAgrar (OA)
5
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
5
Apollo - University of Cambridge Repository
4
Arctic Portal Library
4
Institut national des sciences de l'Univers: HAL-INSU
4
Instituto Español de Oceanografía: e-IEO
4
Pensoft Publishers
4
Rice University: Digital Scholarship Archive
4
Universidade do Algarve: Sapienta
4
Université de Genève: Archive ouverte UNIGE
4
Université de Nantes: HAL-UNIV-NANTES
4
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3
BioOne Online Journals
3
DIAL@USL-B (Université Saint-Louis, Bruxelles)
3
Geological Quarterly
3
HAL Sorbonne Université
3
IRD (Institute de recherche pour le développement): Horizon
3
Magnolia press
3
Niedersächsisches Online-Archiv NOA
3
Ohio State University (OSU): Knowledge Bank
3
Polar Research (E-Journal)
3
Revistes Científiques de la Universitat de Barcelona
3
Universidade Estadual Paulista São Paulo: Repositório Institucional UNESP
3
University of Copenhagen: Research
3
Zenodo
3
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