1. G. Chen, Formation of singularity and smooth wave propagation for the nonisentropic compressible Euler equations, J. Hyperbolic Differ. Equ., in press.
2. G. Chen, R. Young, Shock formation and exact solutions for the compressible Euler equations with piecewise smooth entropy and large data, 2011, submitted for publication.
3. Formation of singularities in one-dimensional nonlinear wave propagation;John;Comm. Pure Appl. Math.,1974
4. Formation of singularities in elastic waves;John,1984
5. Development of singularities of solutions of nonlinear hyperbolic partial differential equations;Lax;J. Math. Phys.,1964