J.Ren

Modified equation of state, scalar field, and bulk viscosity in Friedmann universe

Jie Ren, Xin-he Meng, X. Meng, 2006, astro-ph/0602462.

Cosmological model with viscosity media (dark fluid) described by an effective equation of state

Jie Ren, Xin-he Meng, J.Ren, 2005, astro-ph/0511163.