Limmongkon, Yuparat, Chuleewan Thunyasirinon, Rotruedee Chotigawin, Pipat Sribenjalux, and Paradee Chuaybamroong. 2017. “Airborne microorganism removals using air purifi ers with different principles”. Asia-Pacific Journal of Science and Technology 17 (2):236-44. https://so01.tci-thaijo.org/index.php/APST/article/view/82871.