Talib, A., et al. “Performance of Dye-Sensitized Solar Cell Using Size-Controlled Synthesis of TiO2 Nanostructure”. International Journal of Integrated Engineering, vol. 12, no. 2, Feb. 2020, pp. 106-14, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/5694.