Nitinattrakul, Natcha, and Pichnaree Lalitaporn. “Study the change in air pollution after the COVID-19 outbreak in Thailand”. Engineering and Applied Science Research 50, no. 2 (March 28, 2023): 137–148. accessed August 29, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/250933.