Non-Darcy effect on boundary layer flow of TiO2-water/kerosene nanofluid over an extensible sheet Md Tausif Sk, Kalidas Das and Prabir Kumar Kundu Eur. Phys. J. Plus, 131 9 (2016) 314 Published online: 12 September 2016 DOI: 10.1140/epjp/i2016-16314-1