ScienceDirect
2019
DOAJ: Directory of Open Access Journals
2018-01-01 ~ 현재
De Gruyter Brill Open Journals
2012-03-15 ~ 현재
EBSCO Open Access Journals
2008-01-01 ~ 2009-12-31
ScienceDirect
2023
DOAB Directory of Open Access Books
2024
DOAB Directory of Open Access Books
2025
DOAB Directory of Open Access Books
2012
ScienceDirect
2020
ScienceDirect
1962
ScienceDirect
1964