Mahiddin, N., and M. S. Mohd Noorani. “Penyelesaian Persamaan Resapan-Gompertz Menggunakan Kaedah Penguraian Adomian”. Malaysian Journal of Science, vol. 26, Dec. 2007, pp. 35-41, http://mjs.um.edu.my/index.php/MJS/article/view/8721.