S. Neelkamal, P. H. Veena, and V. K. Pravin. “MHD Momentum Transfer Flow of a Non-Newtonian Walters’ Liquid Over a Quadratic Stretching Porous Sheet”. International Journal of Mathematics And Its Applications, vol. 6, no. 2 - B, June 2018, pp. 305-14, https://ijmaa.in/index.php/ijmaa/article/view/729.