DOAJ: Directory of Open Access Journals
2008-01-01 ~ 현재
Wiley Online Library Open Access
2008-01-01 ~ 현재
DOAB Directory of Open Access Books
2024
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2021
ScienceDirect
2025
ScienceDirect
2020
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2023
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2023
DOAB Directory of Open Access Books
2023
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Springer Nature Link Journals - Fully Open Access
2004-12-01 ~ 현재