DOAJ: Directory of Open Access Journals
2009-01-01 ~ 현재
Wiley Online Library Open Access
2008-01-01 ~ 현재
DOAJ: Directory of Open Access Journals
2024-01-01 ~ 현재
DOAB Directory of Open Access Books
2025
DOAB Directory of Open Access Books
2025
ScienceDirect
1994
EBSCO Open Access Journals
1990-01-01 ~ 2018-12-31
ScienceDirect
2020
ScienceDirect
2010-08-01 ~ 현재
DOAJ: Directory of Open Access Journals
2010-01-01 ~ 현재
ScienceDirect Open Access Titles
2010-08-01 ~ 현재
DOAJ: Directory of Open Access Journals
2017-01-01 ~ 현재
EBSCO Open Access Journals
2006-01-01 ~ 현재
DOAB Directory of Open Access Books
2017