LIANG, R.S., Z.M. Isa, and Shaymaa M.H. Darwish. “Heavy Metals Transport in Soil With Exponential Decay Source”. MATEMATIKA 40, no. 2 (July 31, 2024): 61–71. Accessed November 21, 2024. https://matematika.utm.my/index.php/matematika/article/view/1523.