Saha, S. C., and M. A. Hossain. “ Natural Convection Flow With Combined Buoyancy Effects Due to Thermal and Mass Diffusion in a Thermally Stratified Media”. Nonlinear Analysis: Modelling and Control, vol. 9, no. 1, Jan. 2004, pp. 89-102, https://doi.org/10.15388/NA.2004.9.1.15173.