1. G.B. Whitham, Linear and Nonlinear Waves, 1976.
2. Ray Methods For Nonlinear Waves in Fluids and Plasmas;Anile,1993
3. Multi-dimensional Hyperbolic Partial Differential Equations: First Order Systems and Applications;Benzoni-Gavage,2007
4. Systems of Conversation Laws;Zheng,2001
5. Evolution of weak shocks in one dimensional planar and nonplanar gas dynamic flows;Sharma;Int. J. Nonlinear Mech.,2012