DOAJ: Directory of Open Access Journals
2017-01-01 ~ 현재
OAPEN (Open Access Publishing in European Networks)
2026
DOAB Directory of Open Access Books
2026
Project Muse Open Access ebooks
2026
ScienceDirect
1980
ScienceDirect
1994
ScienceDirect
1990
ScienceDirect
1990
DOAJ: Directory of Open Access Journals
2014-01-01 ~ 현재
Wiley Online Library Open Access
2014-01-01 ~ 현재
DOAB Directory of Open Access Books
2025
DOAB Directory of Open Access Books
2022
EBSCO Open Access Journals
2002-01-01 ~ 현재