DOAJ: Directory of Open Access Journals
2014-01-01 ~ 현재
PubMed Central (PMC)
2014-01-01 ~ 현재
Wiley Online Library Open Access
2014-01-01 ~ 현재
DOAB Directory of Open Access Books
2024
ScienceDirect
1989
ScienceDirect
2026-03-01 ~ 현재
ScienceDirect Open Access Titles
2026-03-01 ~ 현재
ScienceDirect
2020
ScienceDirect
2020
DOAB Directory of Open Access Books
2024
ScienceDirect
2003
DOAB Directory of Open Access Books
2022
DOAB Directory of Open Access Books
2025