R. A.  Potrekar, Kulkarni, M. P., Kulkarni, R. A., and Vernekar, S. P., ?Polybenzimidazoles tethered with N-Phenyl 1,2,4-triazole units as polymer electrolytes for fuel cells?, Journal of Polymer Science Part A-Polymer Chemistry, vol. 47, no. 9, pp. 2289-2303, 2009.

S. C.  Kumbharkar, Islam, M. Nazrul, Potrekar, R. A., and Kharul, U. K., ?Variation in acid moiety of polybenzimidazoles: investigation of physico-chemical properties towards their applicability as proton exchange and gas separation membrane materials?, Polymer, vol. 50, no. 6, pp. 1403-1413, 2009.