Kantowski-Sachs bulk viscous string cosmological model in f(R,T) gravity D. R. K. Reddy, S. Anitha and S. Umadevi Eur. Phys. J. Plus, 129 5 (2014) 96 Published online: 28 May 2014 DOI: 10.1140/epjp/i2014-14096-0