Unsteady MHD three-dimensional flow with viscous dissipation and Joule heating T. Hayat, Anum Naseem, M. Farooq and A. Alsaedi Eur. Phys. J. Plus, 128 12 (2013) 158 Published online: 19 December 2013 DOI: 10.1140/epjp/i2013-13158-1