FRW Bulk Viscous Cosmology with Modified Chaplygin Gas in Flat Space
  In this paper we study FRW bulk viscous cosmology in presence of modified Chaplygin gas. We write modified Friedmann equations due to bulk viscosity and Chaplygin gas and obtain time-dependent energy density for the special case of flat space. 
H. Saadat and B. Pourhassan
physics.gen-ph