DOAB Directory of Open Access Books
2011
OAPEN (Open Access Publishing in European Networks)
2011
DOAB Directory of Open Access Books
2011
DOAB Directory of Open Access Books
2025
DOAB Directory of Open Access Books
2019
J-STAGE Journals (Open Access)
2000-01-01 ~ 현재
EBSCO Open Access Journals
2000-01-01 ~ 현재
DOAJ: Directory of Open Access Journals
2019-01-01 ~ 현재
ScienceDirect
2019
EBSCO Open Access Journals
1973-01-01 ~ 1981-12-31
EBSCO Open Access Journals
1985-01-01 ~ 2014-12-31
ScienceDirect
1999