Cosmic Strings and Anisotropic Universe
  Plane symmetric bulk viscous string cosmological models with strange quark matter are investigated. We have incorporated bulk viscous pressure to study its affect on the properties of the model. Assuming an anisotropic relationship among the metric potentials, we have tried to put some constraints on the anisotropic parameter. 
K. L. Mahanta and S. K. Tripathy
gr-qc