Publisher
Elsevier
22
Wiley
12
MDPI AG
10
Hindawi
6
Springer
Frontiers Media S.A.
5
Cambridge University Press
4
Taylor & Francis
3
Open Library of Humanities
2
SAGE Publications
2
American Institute of Physics (AIP)
1
Copernicus Publications
1
Discover
1
IOP Publishing
1
Royal Society of Chemistry
1
Springer Nature
Wiley-Hindawi
1