Munawar, A., A. I. Durrani, H. Ajaz, and A. K. Durrani. “Molecular Recognition of Angiotensin Converting Enzyme by Snake Venom Bradykinin Potentiating Peptides”. Journal of the Pakistan Institute of Chemical Engineers, vol. 43, no. 1, Apr. 2015, pp. 133-46, http://piche.org.pk/journal/index.php/jpiche/article/view/236.