Polytropic bulk viscous cosmological model with variable G and {\Lambda}
  We consider a Bianchi type-I Polytropic bulk viscous fluid cosmological model with variable G and {\Lambda}. To get a deterministic model, we assume some conditions of A, B, C, and polytropic relation to find the results. physical significance of the cosmological models have also been discussed. 
Rishi Kumar Tiwari, Mukesh Sharma and Sonia Sharma
physics.gen-ph