Sulaymon, Abbas, Yasamen Mustafa, Yasamen Mustafa, and Yasser Dahman. 2002. “Determination of Surface Diffusion Coefficient for Adsorption Process”. Iraqi Journal of Chemical and Petroleum Engineering 3 (2), 35-40. http://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/626.