Mamun, M. A. H. A. H., et al. “Natural Convection in a Porous Trapezoidal Enclosure With Magneto-Hydrodynamic Effect”. Nonlinear Analysis: Modelling and Control, vol. 15, no. 2, Apr. 2010, pp. 159-84, https://doi.org/10.15388/NA.2010.15.2.14352.