DOAB Directory of Open Access Books
2022
ScienceDirect
2016
ScienceDirect
2007
ScienceDirect
2013
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2026
DOAJ: Directory of Open Access Journals
2022-01-01 ~ 현재
ScienceDirect
2011
ScienceDirect
2021-01-01 ~ 현재
DOAJ: Directory of Open Access Journals
2021-01-01 ~ 현재
ScienceDirect Open Access Titles
2021-01-01 ~ 현재
OAPEN (Open Access Publishing in European Networks)
2019
DOAB Directory of Open Access Books
2019