Ngamchaliew, P., P. . Vichitkunakorn, P. . Wangsapan, N. . Buppodom, N. . Junchoo, P. . Chanhom, G. . Sudsangiam, M. . Patpoom, and C. . Chaichana. “Innovative Device for Enhancing Physical Distancing in the COVID-19 Situation”. Siriraj Medical Journal, vol. 73, no. 2, Feb. 2021, pp. 69-76, doi:10.33192/Smj.2021.10.