Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
3,254
PANGAEA - Data Publisher for Earth & Environmental Science
690
Directory of Open Access Journals: DOAJ Articles
256
Springer Nature (via Crossref)
171
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
145
Unknown
142
University of Michigan: Digital Collections
120
Zenodo
116
ScienceDirect (Elsevier - via Crossref)
107
Cambridge University Press
96
AU Digital Research Archive (American University)
93
Frontiers: Figshare
86
PubMed Central (PMC)
82
Natural Environment Research Council: NERC Open Research Archive
71
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
61
National Institute of Polar Research Repository, Japan
48
USP Production Repository (Universidade de São Paulo)
48
De Gruyter (via Crossref)
46
MDPI Open Access Publishing
45
LeibnizOpen (The Leibniz Association)
39
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
36
Digital.CSIC (Spanish National Research Council)
34
Universidade Federal do Rio Grande do Sul (UFRGS): Lume
32
Arctic Portal Library
31
Informa (via Crossref)
26
University of Freiburg: FreiDok
26
Wiley Online Library (via Crossref)
21
Copernicus Publications: E-Journals
20
Geological Quarterly
20
Jagiellonian University Repository
20
ScienceDirect (Elsevier)
20
Sciendo (de Gruyter - via CrossRef)
20
University of São Paulo: Digital Library of Theses and Dissertations
20
Ghent University Academic Bibliography
19
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences)
19
Research Center for Eco-Environmental Sciences: RCEES OpenIR (Chinese Academy of Sciences)
19
Universidad de Chile: Repositorio académico
18
Universidade Estadual Paulista São Paulo: Repositório Institucional UNESP
18
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
17
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
17
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
16
Frontiers (Publisher)
15
Niedersächsisches Online-Archiv NOA
15
Université de Nantes: HAL-UNIV-NANTES
14
Wiley Online Library
14
Magnolia press
12
Masaryk University Journals
12
RI FURG (Repositório da Universidade Federal do Rio Grande)
12
ASM Journals (American Society for Microbiology - via Crossref)
11
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
11
more ...