Content Provider
Directory of Open Access Journals: DOAJ Articles
5
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
4
Cambridge University Press
3
Old Dominion University: ODU Digital Commons
3
Dryad Digital Repository (Duke University)
2
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences)
2
ScienceDirect (Elsevier - via Crossref)
2
DataCite Metadata Store (German National Library of Science and Technology)
1
IRIS Università degli Studi di Palermo
1
SAGE Publications (via Crossref)
1
Schweizerbart Science Publishers (via Crossref)
1
The University of Queensland: UQ eSpace
1
University College London: UCL Discovery
1
Università degli Studi di Bari Aldo Moro: CINECA IRIS
1
Unknown
1