Zaine, S., N. Mohamed, M. Khatani, and M. Shahid. “Effect of Paste Viscosity on Direct-Current Resistance in Improving the Efficiency of Dye-Sensitized Solar Cell”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 10, no. 1-12, Mar. 2018, pp. 73-78, https://jtec.utem.edu.my/jtec/article/view/3829.