DOAJ: Directory of Open Access Journals
2020-01-01 ~ 현재
ScienceDirect
2022
DOAB Directory of Open Access Books
2020
OAPEN (Open Access Publishing in European Networks)
2023
DOAB Directory of Open Access Books
2023
Springer Nature Link eBooks - Fully Open Access
2023
DOAB Directory of Open Access Books
2024
OAPEN (Open Access Publishing in European Networks)
2018
DOAB Directory of Open Access Books
2018
ScienceDirect
2009
ScienceDirect
2010
ScienceDirect
2021
ScienceDirect
2016