Shehzad, M. A., and A. A. Qaiser. “Preparation and Characterization of Ion Exchange Membranes Based on Polyaniline and Thermoplastic Polyurethane Blends”. Journal of the Pakistan Institute of Chemical Engineers, vol. 42, no. 1, July 2014, pp. 63-69, http://piche.org.pk/journal/index.php/jpiche/article/view/162.