Content Provider
Cambridge University Press
599
Informa (via Crossref)
93
Canadian Science Publishing (via Crossref)
92
Springer Nature (via Crossref)
81
ScienceDirect (Elsevier - via Crossref)
65
ScienceDirect (Elsevier)
39
Canadian Science Publishing
28
Cambridge University Press (via Crossref)
10
Informa
10
SAGE Publications (via Crossref)
8
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
6
Wiley Online Library (via Crossref)
6
University of Chicago Press (via Crossref)
5
The BMJ
2
DIAL@UCLouvain (Université catholique de Louvain)
1
DIAL@USL-B (Université Saint-Louis, Bruxelles)
1
Ghent University Academic Bibliography
1
IEEE Publications (via Crossref)
1
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
1
Johns Hopkins University Press
1
SAGE Publications
1
Schweizerbart Science Publishers (via Crossref)
1
Wiley Online Library
1