T. H. Trinh, C. C. Le, T. T. B. Bui, T. H. P. Nguyen, S. Kawahara, and T. N. Phan, “Preparation of Ionic Conductivity Polymer Electrolyte Film Based on Epoxidized Deproteinized Natural Rubber”, ETSD, vol. 31, no. 4, pp. 68–74, Oct. 2021.