Content Provider
Cambridge University Press
73
ScienceDirect (Elsevier - via Crossref)
8
ScienceDirect (Elsevier)
6
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences)
2
University of California Press (via Crossref)
2
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
1
PUBLISSO Fachrepositorium Lebenswissenschaften (ZB MED)
1
University of California: eScholarship
1