Plane-Symmetric Inhomogeneous Bulk Viscous Cosmological Models with   Variable $\Lambda$
  A plane-symmetric non-static cosmological model representing a bulk viscous fluid distribution has been obtained which is inhomogeneous and anisotropic and a particular case of which is gravitationally radiative. Without assuming any {\it adhoc} law, we obtain a cosmological constant as a decreasing function of time. The physical and geometric features of the models are also discussed. 
Anirudh Pradhan and Hare Ram Pandey