Content Provider
Apollo - University of Cambridge Repository
3
DataCite Metadata Store (German National Library of Science and Technology)
3
Directory of Open Access Journals: DOAJ Articles
3
Natural Environment Research Council: NERC Open Research Archive
3
Research Data Australia (Australian National Data Service - ANDS)
2
Unknown
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
Copernicus Publications: E-Journals
1
Digital Commons University of South Florida (USF)
1
Digital.CSIC (Spanish National Research Council)
1
MDPI Open Access Publishing
1
Niedersächsisches Online-Archiv NOA
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
Oxford University Press (via Crossref)
1
PANGAEA - Data Publisher for Earth & Environmental Science
1
PubMed Central (PMC)
1
Springer Nature (via Crossref)
1
University of Nottingham: Repository@Nottingham
1
University of South Florida St. Petersburg: Digital USFSP
1
University of Southampton: e-Prints Soton
1
Wageningen UR (University & Research Centre): Digital Library
1