Sabariah Abas, Siti, et al. “Travelling-Wave Similarity Solution for Gravity-Driven Rivulet of a Non-Newtonian Fluid”. International Journal of Engineering & Technology, vol. 7, no. 2.15, Apr. 2018, pp. 38-40, https://doi.org/10.14419/ijet.v7i2.15.11208.