Fatunmbi, E. O., and O. J. Fenuga. “MHD Micropolar Fluid Flow Over a Permeable Stretching Sheet in the Presence of Variable Viscosity and Thermal Conductivity With Soret and Dufour Effects.”. International Journal of Mathematical Sciences and Optimization: Theory and Applications, Vol. 2017, Apr. 2018, pp. 211 -32, http://ijmso.unilag.edu.ng/article/view/10.