R. S.  Bhavsar, Kumbharkar, S. C., and Kharul, U. K., ?Polymeric ionic liquids (PILs): effect of anion variation on their CO2 sorption?, Journal of Membrane Science, vol. 389, pp. 305-315, 2012.

A. S.  Rewar, Shaligram, S. V., and Kharul, U. K., ?Polybenzimidazole based polymeric ionic liquids possessing partial ionic character: effects of anion exchange on their gas permeation properties?, Journal of Membrane Science, vol. 497, pp. 282-288, 2016.