KAY, A., 2017. Comments on 'Combined effect of variable viscosity and thermal conductivity on free convection flow of a viscous fluid in a vertical channel using DTM' by J.C. Umavathi and M. Shekar. Meccanica, 52 (6), pp. 1493–1494.
A recent paper by Umavathi and Shekar addressed an important problem in thermal convection, but is unfortunately marred by several inadequacies.
The final publication is available at Springer via http://dx.doi.org/10.1007/s11012-016-0497-9.