Content Provider
Directory of Open Access Journals: DOAJ Articles
67
Natural Environment Research Council: NERC Open Research Archive
58
Cambridge University Press
40
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
33
Digital.CSIC (Spanish National Research Council)
31
DataCite Metadata Store (German National Library of Science and Technology)
30
Wiley Online Library
22
Unknown
14
Ghent University Academic Bibliography
12
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
11
Universidade de Lisboa: repositório.UL
11
Springer Nature (via Crossref)
10
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
9
Universidad de Chile: Repositorio académico
9
ScienceDirect (Elsevier - via Crossref)
8
Dipòsit Digital de la Universitat de Barcelona
7
Frontiers (Publisher)
7
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
7
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
6
Instituto Español de Oceanografía: e-IEO
6
Zenodo
6
De Gruyter (via Crossref)
5
Institut national des sciences de l'Univers: HAL-INSU
5
Masaryk University Journals
5
Munipress - Masaryk University Press
5
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
5
ScienceDirect (Elsevier)
5
Arctic Portal Library
4
Australian National University: ANU Digital Collections
4
Dryad Digital Repository (Duke University)
4
Geological Quarterly
4
HAL Sorbonne Université
4
Universidade do Algarve: Sapienta
4
Université de Genève: Archive ouverte UNIGE
4
Université de Nantes: HAL-UNIV-NANTES
4
Durham University: Durham Research Online
3
Electrical Engineering and Power Engineering (EE&PE - E-Journal)
3
Magnolia press
3
Niedersächsisches Online-Archiv NOA
3
Northumbria University, Newcastle: Northumbria Research Link (NRL)
3
ORA - Oxford University Research Archive
3
OpenAgrar (OA)
3
Polar Research (E-Journal)
3
Repositorio Digital Conicyt RI 2.0 (Comisión Nacional de Investigación Científica y Tecnológica)
3
Revistes Científiques de la Universitat de Barcelona
3
Scientific Periodicals of Ukraine (Ukrainian Research and Academic Network)
3
Universidad de Las Palmas de Gran Canaria: Acceda
3
Universidade Estadual Paulista São Paulo: Repositório Institucional UNESP
3
University of Copenhagen: Research
3
University of Glasgow: Enlighten - Publications
3
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