DOAB Directory of Open Access Books
2010
MIT Press Direct to Open Backfile Complete Monographs
2001
DOAB Directory of Open Access Books
2016
OAPEN (Open Access Publishing in European Networks)
2007
DOAB Directory of Open Access Books
2017
ScienceDirect
1993
EBSCO Open Access Journals
2013-01-01 ~ 현재
EBSCO Open Access Journals
2000-01-01 ~ 현재
EBSCO Open Access Journals
1995-01-01 ~ 현재
ScienceDirect
1969-07-01 ~ 현재