Prutchayawoot Thopan, Kittikun Pituprompun, Vishnu Thonglek, and Vitsanusat Atyotha. “Effects of Micro/Nano Bubble-Aeration Time on Removal of Rn-222 Contamination in Tap Water”. Science & Technology Asia, vol. 28, no. 2, June 2023, pp. 43-52, https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/249856.