Rupiasih, N. N., M. Sumadiyasa, I. K. Putra, and N. M. Rasmini. “Study on Transport Properties of Chitosan Membrane in Different Types of Electrolytes”. Journal of Mathematical and Fundamental Sciences, vol. 50, no. 2, Aug. 2018, pp. 182-91, doi:10.5614/j.math.fund.sci.2018.50.2.6.