V.Sethuprakhash, Hafizah Rajaa Shaari, A.Shah, Kesevan Nallaluthan. “Sulfonic Acid Based Polyacrylamide Gel Polymer Electrolytes Used In Zinc-Air And Tin-Air Cells For Cyclic Voltammetry Analysis”. International Journal of Advanced Science and Technology, Vol. 29, no. 12s, May 2020, pp. 53 -63, http://sersc.org/journals/index.php/IJAST/article/view/21883.