OAPEN (Open Access Publishing in European Networks)
2026
DOAB Directory of Open Access Books
2026
Books at JSTOR: Open Access
2026
DOAB Directory of Open Access Books
2011
ScienceDirect
2003
DOAB Directory of Open Access Books
2010
EBSCO Open Access Journals
2006-01-01 ~ 2024-12-31
ScienceDirect
2015
ScienceDirect
1998
DOAB Directory of Open Access Books
2022
DOAB Directory of Open Access Books
2021
EBSCO Open Access Journals
1903-01-01 ~ 현재