Content Provider
Cambridge University Press
651
Informa (via Crossref)
144
Canadian Science Publishing (via Crossref)
99
Springer Nature (via Crossref)
85
ScienceDirect (Elsevier - via Crossref)
79
Frontiers (Publisher)
48
ScienceDirect (Elsevier)
41
Canadian Science Publishing
37
Wiley Online Library (via Crossref)
17
IEEE Publications (via Crossref)
12
Informa
11
JSTOR (via Crossref)
11
Cambridge University Press (via Crossref)
10
IEEE Publications
9
SAGE Publications (via Crossref)
8
Wiley Online Library
8
University of Chicago Press (via Crossref)
5
Sciendo (de Gruyter - via CrossRef)
3
The Royal Society (via Crossref)
3
Brill (via Crossref)
2
SPIE Publications (via Crossref)
2
The BMJ
2
De Gruyter
1
De Gruyter (via Crossref)
1
Ghent University Academic Bibliography
1
Johns Hopkins University Press
1
Munipress - Masaryk University Press
1
SAGE Publications
1
Schweizerbart Science Publishers (via Crossref)
1
UCL Press (via Crossref)
1
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
1