1. Structure of Riemann solutions for 2-dimensional scalar conservation laws;Chen;J. Differential Equations,1996
2. Global solution of the Cauchy problem for quasilinear first-order equations in several variables;Conway;Comm. Pure Appl. Math.,1966
3. Shocks and rarefactions in two space dimensions;Guckenheimer;Arch. Rational Mech. Anal.,1975
4. L. Hsiao, and, C. Kilingenberg, The structure of the solution for the two-dimensional Riemann problem, preprint, Heidelberg Univ, 1986.