ลดาชาติ ล., ภูทวี ม., and ลดาชาติ ล. “A Hypothetical Learning Progression for Haze Air Pollution in the Northern Region of Thailand”. Integrated Social Science Journal, Mahidol University, vol. 6, no. 1, June 2019, pp. 116-50, https://so02.tci-thaijo.org/index.php/isshmu/article/view/192902.