Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
460
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
54
Unknown
20
Directory of Open Access Journals: DOAJ Articles
16
Copernicus Publications: E-Journals
7
RePEc (Research Papers in Economics)
7
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
6
Dialnet - Portada de revistas (Universidad de La Rioja)
5
Digital.CSIC (Spanish National Research Council)
5
Zenodo
5
Niedersächsisches Online-Archiv NOA
4
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3
MDPI Open Access Publishing
3
Portal de Revistas de la Universidad de La Rioja
3
The University of Delaware Library Institutional Repository
3
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
3
Wiley Online Library
3
ARPI - Archivio della Ricerca dell'Università di Pisa
2
National Institute of Polar Research Repository, Japan
2
RID-UnRN - Repositorio Institucional Digital Universidad Nacional de Río Negro
2
ScienceDirect (Elsevier - via Crossref)
2
UNESDOC - UNESCO Digital Library
2
Universidad Nacional del Comahue: E-Journals
2
Universidad de Chile: Repositorio académico
2
Universidade de Lisboa: repositório.UL
2
Université Grenoble Alpes: HAL
2
Vrije Universiteit Amsterdam (VU): Research Portal
2
Wiley Online Library (via Crossref)
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
BOKU:ePUB (Publikationsserver der Universitätsbibliothek Bodenkultur Wien)
1
CIC-Digital (Repositorio de la Comisión de Investigaciones Científicas de la Provincia de Buenos Aires)
1
Cambridge University Press
1
CentAUR: Central Archive at the University of Reading
1
Cologne University: KUPS
1
Defense Technical Information Center: DTIC Technical Reports database
1
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
1
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
1
Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources)
1
GEO-LEOe-docs (FID GEO)
1
Ghent University Academic Bibliography
1
IRD (Institute de recherche pour le développement): Horizon
1
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
1
IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria)
1
KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences)
1
LaCRIS - University of Lapland Current Research System
1
Lincoln University (New Zealand): Lincoln U Research Archive
1
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
Open Access LMU (Ludwig-Maximilians-University Munich)
1
more ...