indexing
- Directory of Open Access Journals (DOAJ)
- Moraref
- Portal Garuda
- Google Scholar
- Bielefeld Academic Search Engine (BASE)
- CORE
- Leiden University Libraries
- Gent Univesity Library
- University of Oxford
- The University of Sheffield
- Bayerische Staats Bibliothek
- University of Saskatchewan Library
- Columbia University Libraries
- philpapers.org
- semanticscholar
- Copernicus
- Sciencegate
- Dimension
- National Library Myanmar
- Globethics
- Letpub
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