DOAJ: Directory of Open Access Journals
2022-01-01 ~ 현재
EBSCO Open Access Journals
2007-01-01 ~ 현재
ScienceDirect
1996
ScienceDirect
1996
ScienceDirect
1992-01-01 ~ 현재
ScienceDirect
1978-12-01 ~ 1990-10-31
ScienceDirect
1991-01-01 ~ 1991-11-30
DOAB Directory of Open Access Books
2025
DOAB Directory of Open Access Books
2023
Wiley Online Library Open Access
2014-01-01 ~ 2016-12-31