OAPEN (Open Access Publishing in European Networks)
2010
DOAB Directory of Open Access Books
2010
OAPEN (Open Access Publishing in European Networks)
2012
DOAB Directory of Open Access Books
2012
OAPEN (Open Access Publishing in European Networks)
2021
DOAB Directory of Open Access Books
2021
De Gruyter Brill Open Access eBooks
2021
DOAB Directory of Open Access Books
2026
DOAB Directory of Open Access Books
2020
ScienceDirect
2010
ScienceDirect
2025
DOAB Directory of Open Access Books
2020
MIT Press Direct eBooks - Open Access
2026
DOAB Directory of Open Access Books
2021
Books at JSTOR: Open Access
2021