The main aim of the above three papers is to study the effects of secondorder slip and viscous dissipation on the boundary layer flow and heat transfer of an incompressible Newtonian fluid past a permeable stretching surface embedded in a porous medium using the implicit finite difference method (FDM) in the first paper[1] , the differential transformation method (DTM) in the second paper [2] and Chebyshev finite difference method in the third paper [3] . It is known that the heat transfer results may alter appreciably due to viscous dissipation in two cases namely: (i) the fluid is very viscous even though low speed velocity i.e. liquid fluids and (ii) high speed velocity. While in the case of high speed velocity, the rigid matrix resistance is no longer given by Darcy's law, i.e. the velocity – square term in the momentum equation (3) becomes significant [ 4 ] .