Content Provider
Informa (via Crossref)
60
Informa
36
Springer Nature (via Crossref)
33
ScienceDirect (Elsevier - via Crossref)
12
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
9
The University of Queensland: UQ eSpace
1
University of Liège: ORBi (Open Repository and Bibliography)
1
University of Nottingham: Repository@Nottingham
1