ScienceDirect
1974
DOAB Directory of Open Access Books
2018
ScienceDirect
1996-01-01 ~ 2003-12-31
DOAB Directory of Open Access Books
2026
EBSCO Open Access Journals
2004-01-01 ~ 현재
ScienceDirect
1987
DOAB Directory of Open Access Books
2011
EBSCO Open Access Journals
2016-01-01 ~ 현재
DOAB Directory of Open Access Books
2023
EBSCO Open Access Journals
1990-01-01 ~ 현재