Content Provider
ScienceDirect (Elsevier - via Crossref)
49
Springer Nature (via Crossref)
27
ScienceDirect (Elsevier)
20
Oxford University Press (via Crossref)
15
Columbia University: Academic Commons
12
Oxford University Press
12
eCite UTAS (University of Tasmania)
9
Utrecht University Repository
7
Informa (via Crossref)
3
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
3
Wiley Online Library (via Crossref)
2
Caltech Authors (California Institute of Technology)
1
The University of Adelaide: Digital Library
1
The University of Queensland: UQ eSpace
1
University of Liège: ORBi (Open Repository and Bibliography)
1
Università degli Studi di Genova: CINECA IRIS
1
Wiley Online Library
1