Comments on An implicit-Chebyshev pseudospectral method for the effect   of radiation on power-law fluid past a vertical plate immersed in a porous   medium, by N.S. Elgazery,CNSNS,2008
  In the above paper the author treats the boundary layer flow of an electrically conducting, non-Newtonian fluid along a vertical plate embedded in a Darcy-Brinkman-Forchheimer porous medium. The fluid is under the action of a constant transverse magnetic field and the radiation is taken into account in the energy equation. The boundary layer equations are transformed into ordinary ones and subsequently are solved numerically. However, there is a fundamental error in this paper which is presented below: 
Asterios Pantokratoras