ScienceDirect
2026
DOAB Directory of Open Access Books
1951
De Gruyter Brill Open Access eBooks
1951
DOAB Directory of Open Access Books
2025
OAPEN (Open Access Publishing in European Networks)
2025
De Gruyter Brill Open Access eBooks
2026
ScienceDirect
1975
DOAJ: Directory of Open Access Journals
1996-01-01 ~ 현재
EBSCO Open Access Journals
1996-01-01 ~ 현재
Wiley Online Library Open Access
1996-01-01 ~ 현재
J-STAGE Journals (Open Access)
2006-01-01 ~ 2006-12-31
ScienceDirect
2015
DOAB Directory of Open Access Books
2016
J-STAGE Journals (Open Access)
2004-01-01 ~ 2007-12-31