Content Provider
Directory of Open Access Journals: DOAJ Articles
267
Unknown
209
DataCite Metadata Store (German National Library of Science and Technology)
170
Copernicus Publications: E-Journals
118
Niedersächsisches Online-Archiv NOA
93
PANGAEA - Data Publisher for Earth & Environmental Science
83
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
78
Cambridge University Press
69
LeibnizOpen (The Leibniz Association)
58
PubMed Central (PMC)
57
Natural Environment Research Council: NERC Open Research Archive
54
University of Calgary Journal Hosting
54
Ohio State University (OSU): Knowledge Bank
53
eCite UTAS (University of Tasmania)
53
Université de Nantes: HAL-UNIV-NANTES
48
Institut national des sciences de l'Univers: HAL-INSU
47
MDPI Open Access Publishing
43
Defense Technical Information Center: DTIC Technical Reports database
42
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
34
Wiley Online Library (via Crossref)
29
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
23
Zenodo
20
HAL Sorbonne Université
19
University of Tasmania: UTas ePrints
19
Digital.CSIC (Spanish National Research Council)
18
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
17
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
17
Max Planck Society: MPG.PuRe
17
National Institute of Polar Research Repository, Japan
17
Wiley Online Library
17
Arctic Portal Library
16
Springer Nature (via Crossref)
16
Lund University Publications (LUP)
15
CentAUR: Central Archive at the University of Reading
14
WikiBooks - Open-content textbooks
14
Canadian Science Publishing (via Crossref)
13
DIAL@USL-B (Université Saint-Louis, Bruxelles)
13
DSpace@MIT (Massachusetts Institute of Technology)
13
Polar Research (E-Journal)
12
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
12
Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources)
11
SAGE Publications (via Crossref)
11
University of Canterbury, Christchurch: UC Research Repository
11
Università degli Studi di Siena: USiena air
11
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
10
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
10
Cambridge University Press (via Crossref)
10
DIAL@UCLouvain (Université catholique de Louvain)
10
Informa (via Crossref)
10
University of Tromsø: Munin Open Research Archive
10
more ...