Some Bianchi Type III String Cosmological Models with Bulk Viscosity
  We investigate the integrability of cosmic strings in Bianchi III space-time in presence of a bulk viscous fluid by applying a new technique. The behaviour of the model is reduced to the solution of a single second order nonlinear differential equation. We show that this equation admits an infinite family of solutions. Some physical consequences from these results are also discussed. 
Mahesh Kumar Yadav, Anju Rai and Anirudh Pradhan