Content Provider
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
6
Cambridge University Press
2
Copernicus Publications: E-Journals
13
DataCite Metadata Store (German National Library of Science and Technology)
13
Frontiers (Publisher)
1
IOP Publishing
1
MACAU: Open Access Repository of Kiel University
1
NASA Technical Reports Server (NTRS)
3
National Space Science Center: NSSC OpenIR (Chinese Academy of Sciences)
1
Natural Environment Research Council: NERC Open Research Archive
1
Niedersächsisches Online-Archiv NOA
6
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
3
PANGAEA - Data Publisher for Earth & Environmental Science
2
Peking University Institutional Repository (PKU IR)
5
PubMed Central (PMC)
5
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
1
ScienceDirect (Elsevier - via Crossref)
3
ScienceDirect (Elsevier)
4
Springer Nature (via Crossref)
7
University of California: eScholarship
1
Wiley Online Library
3
Zenodo
1