“…Yadav et al (2007aYadav et al ( , 2007b have obtained the integrability of cosmic string in Bianchi type III space-time in presence of bulk viscous fluid by applying a new technique. Reddy (2003, , , Rao et al (2008aRao et al ( , 2008bRao et al ( , 2009), Rao and Vinutha (2010), Pradhan (2007Pradhan ( , 2009), Pradhan and Mathur (2008) and Pradhan et al ( , 2010aPradhan et al ( , 2010b have studied string cosmological models in different contexts. Recently, Belinchon (2009aBelinchon ( , 2009b, Pradhan et al (2009), Amirhashchi andZainuddin (2010) and Tripathi et al (2009Tripathi et al ( , 2010 have obtained cosmic strings in different Bianchi type spacetimes.…”