Asanavijit, V. ., P. . Intra, W. . Rattanachan, and P. . Pattanun. “Evaluation of the Filtration Efficiency of Aerosol Particles of the Commercial Air Purifiers for Indoor Use”. Engineering and Technology Horizons, vol. 38, no. 4, Dec. 2021, pp. 166-77, https://ph01.tci-thaijo.org/index.php/lej/article/view/245074.