OAPEN (Open Access Publishing in European Networks)
2020
DOAB Directory of Open Access Books
2020
ScienceDirect
2010
ScienceDirect
2007
ScienceDirect
1995-03-01 ~ 2009-12-31
DOAJ: Directory of Open Access Journals
2019-01-01 ~ 현재
PubMed Central (PMC)
2019-01-01 ~ 현재
Oxford Journals Open Access
2019-01-01 ~ 현재
ScienceDirect
2021
ScienceDirect
2019
EBSCO Open Access Journals
2009-01-01 ~ 2021-12-31
DOAJ: Directory of Open Access Journals
2021-01-01 ~ 현재
OAPEN (Open Access Publishing in European Networks)
2019
Taylor & Francis eBooks (Open Access)
2019