DOAJ: Directory of Open Access Journals
2011-01-01 ~ 현재
PubMed Central (PMC)
2011-01-01 ~ 현재
Wiley Online Library Open Access
2011-01-01 ~ 현재
DOAB Directory of Open Access Books
2020
DOAB Directory of Open Access Books
2015
Wiley Online Library Open Access
2014-01-01 ~ 2016-12-31
DOAB Directory of Open Access Books
2024
EBSCO Open Access Journals
2002-01-01 ~ 2012-12-31
OAPEN (Open Access Publishing in European Networks)
2018
DOAB Directory of Open Access Books
2018
ScienceDirect
1990-01-01 ~ 현재
IOS Press Open Access eBooks
2022