ScienceDirect
2009
ScienceDirect
2009
ScienceDirect
2014
ScienceDirect
2020
DOAB Directory of Open Access Books
2022
De Gruyter Brill Open Access eBooks
2026
누리미디어 (DBPia)
1998-01-01 ~ 1998-12-31
DOAB Directory of Open Access Books
2023
OAPEN (Open Access Publishing in European Networks)
2021
DOAB Directory of Open Access Books
2021
Taylor & Francis eBooks (Open Access)
2020
De Gruyter Brill Open Access eBooks
2025