Content Provider
Directory of Open Access Journals: DOAJ Articles
136
Natural Environment Research Council: NERC Open Research Archive
107
Cambridge University Press
95
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
78
Digital.CSIC (Spanish National Research Council)
62
DataCite Metadata Store (German National Library of Science and Technology)
46
Springer Nature (via Crossref)
44
Unknown
32
De Gruyter (via Crossref)
26
ScienceDirect (Elsevier - via Crossref)
21
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
18
IRUA - Institutional Repository van de Universiteit Antwerpen
18
Magnolia press
18
Ghent University Academic Bibliography
17
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
16
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
16
Zenodo
16
Universidade de Lisboa: repositório.UL
14
Instituto Español de Oceanografía: e-IEO
13
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
12
Dipòsit Digital de la Universitat de Barcelona
11
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual)
11
Universidad de Chile: Repositorio académico
11
Vernadsky National Library of Ukraine: DSpace
11
Wiley Online Library (via Crossref)
11
Wiley Online Library
10
Masaryk University Journals
9
The Czech Academy of Sciences: Publication Activity (ASEP)
8
Université de Nantes: HAL-UNIV-NANTES
8
Arctic Portal Library
7
Geological Quarterly
7
Polar Research (E-Journal)
7
Universidade Estadual Paulista São Paulo: Repositório Institucional UNESP
7
Frontiers (Publisher)
6
Universidad de Las Palmas de Gran Canaria: Acceda
6
eCite UTAS (University of Tasmania)
6
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
5
HAL Sorbonne Université
5
Institut national des sciences de l'Univers: HAL-INSU
5
Niedersächsisches Online-Archiv NOA
5
University College London: UCL Discovery
5
University of Glasgow: Enlighten - Publications
5
University of Lodz Repository (RUŁ)
5
University of Southampton: e-Prints Soton
5
Wageningen UR (University & Research Centre): Digital Library
5
Australian National University: ANU Digital Collections
4
Biodiversity Heritage Library (BHL)
4
Dialnet - Portada de revistas (Universidad de La Rioja)
4
Dryad Digital Repository (Duke University)
4
Durham University: Durham Research Online
4
more ...