Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
16,415
PANGAEA - Data Publisher for Earth & Environmental Science
94
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
76
NOAA NCEI Environmental Data Archive (via DataONE)
14
Zenodo
14
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
12
Springer Nature (via Crossref)
11
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
9
Directory of Open Access Journals: DOAJ Articles
9
The University of Dublin, Trinity College: TARA (Trinity's Access to Research Archive)
8
Frankfurt/Main University Library: Digitale Sammlungen
7
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
7
University of Groningen research database
7
Unknown
7
Frontiers: Figshare
6
PubMed Central (PMC)
6
Hereon Publications (Helmholtz-Zentrum)
5
Max Planck Society: MPG.PuRe
5
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
4
Frontiers (Publisher)
4
Publication Server of Goethe University Frankfurt am Main
4
ScienceDirect (Elsevier - via Crossref)
3
Wiley Online Library (via Crossref)
3
ediss.sub.hamburg (Staats- und Universitätsbibliothek Hamburg, Carl von Ossietzky)
3
Copernicus Publications: E-Journals
2
GEO-LEOe-docs (FID GEO)
2
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
2
Ghent University Academic Bibliography
2
HAL Sorbonne Université
2
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
2
North Dakota State University (NDSU): Digital Horizons
2
Rijksuniversiteit Groningen: University of Groningen Press
2
The digital State Library of Upper Austria (oö)
2
Universidade do Algarve: Sapienta
2
Arctic Institute of North America (via Crossref)
1
Augsburg University Publication Server (OPUS)
1
BU praktisch (E-Journal, Bielefeld University)
1
Bangor University: Research Portal
1
Brill
1
Cambridge University Press
1
Cardiff University: ORCA (Online Research @ Cardiff)
1
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
1
David Rumsey Historical Map Collection (Cartography Associates)
1
Defense Technical Information Center: DTIC Technical Reports database
1
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
1
Digital.CSIC (Spanish National Research Council)
1
Dryad Digital Repository (Duke University)
1
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
1
GFZ Data Services (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
GettDigital (Gettysburg College Digital Collections)
1
more ...