Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
486
DataCite Metadata Store (German National Library of Science and Technology)
250
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
141
DataCite
48
WikiBooks - Open-content textbooks
22
Directory of Open Access Journals: DOAJ Articles
20
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
16
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
12
Unknown
12
Zenodo
12
Copernicus Publications: E-Journals
11
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE)
8
Arctic Data Center (via DataONE)
6
Max Planck Society: MPG.PuRe
6
Wiley Online Library
6
German Aerospace Center: elib - DLR electronic library
5
Niedersächsisches Online-Archiv NOA
5
Frontiers: Figshare
3
Hereon Publications (Helmholtz-Zentrum)
3
Northumbria University, Newcastle: Northumbria Research Link (NRL)
3
RePEc (Research Papers in Economics)
3
Saint Petersburg State University: Research Repository (DSpace SPbU)
3
ScholarsArchive@OSU (Oregon State University)
3
Frontiers (Publisher)
2
GFZ Data Services (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
2
IOP Publishing
2
Informa
2
MDPI Open Access Publishing
2
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
2
ScienceDirect (Elsevier - via Crossref)
2
Springer Nature (via Crossref)
2
Technical University of Denmark: DTU Orbit
2
The Czech Academy of Sciences: Publication Activity (ASEP)
2
University of Freiburg: FreiDok
2
University of Potsdam: publish.UP
2
Aarhus University: Research
1
Altai State University: Scientific Journals of ASU
1
Arctic Institute of North America
1
Arctic Portal Library
1
Arctic and Antarctic Research
1
Cambridge University Press
1
Canadian Science Publishing
1
Cologne University: KUPS
1
CyberLeninka (Scientific Electronic Library)
1
DRO - Deakin Research Online
1
Florida Online Journals (FloridaOJ)
1
Freie Universität Berlin: Refubium (FU Berlin)
1
Georg-August-Universität Göttingen: GOEDOC
1
Heidelberg University: HeiDok
1
Hemeroteca Científica Catalana (IEC - Institut d'Estudis Catalans)
1
more ...