Rahmat, M., Y. Alias, W. Basirun, L. Aldous, and C. Hardacre. “Conductivity Studies of Grafted Natural Rubber and Ionic Liquid Electrolyte Systems”. Malaysian Journal of Science, vol. 28, no. 2, Aug. 2009, pp. 209-15, doi:10.22452/mjs.vol28no2.10.