DOAB Directory of Open Access Books
2021
DOAB Directory of Open Access Books
2015
ScienceDirect
2020
DOAB Directory of Open Access Books
2021
OAPEN (Open Access Publishing in European Networks)
2026
DOAB Directory of Open Access Books
2026
Springer Nature Link eBooks - Fully Open Access
2026
ScienceDirect
2012
ScienceDirect
2021
ScienceDirect
1970
ScienceDirect
2000
ScienceDirect
1995