DOAB Directory of Open Access Books
2011
DOAJ: Directory of Open Access Journals
2020-01-01 ~ 현재
J-STAGE Journals (Open Access)
2012-01-01 ~ 현재
DOAJ: Directory of Open Access Journals
2012-01-01 ~ 현재
PubMed Central (PMC)
2012-01-01 ~ 현재
EBSCO Open Access Journals
2012-01-01 ~ 현재
DOAB Directory of Open Access Books
2011
DOAB Directory of Open Access Books
2020
ScienceDirect
2025-01-01 ~ 현재
ScienceDirect Open Access Titles
2025-01-01 ~ 현재
ScienceDirect
2024
DOAB Directory of Open Access Books
2021
ScienceDirect
2019
ScienceDirect
2026-06-01 ~ 현재
ScienceDirect Open Access Titles
2026-06-01 ~ 현재