Theerathammakorn, S., S. Soontornchai, and P. Amornrit. “A competency-based learning model for distance education in the post-COVID-19 era: Sustainable manufacturing systems and the circular economy”. Humanities, Arts and Social Sciences Studies, vol. 24, no. 2, Aug. 2024, pp. 490–502, doi:10.69598/hasss.24.2.267798.