1. Water Waves;Stoker,1957
2. Supersonic Flow and Shock Waves;Courant,1948
3. Non-linear Wave Motion;Friedrichs;A.E.C. Research and Development Report, NYO-6486,1958
4. Non-linear hyperbolic equations;Lax;Comm. Pure Appl. Math.,1953
5. Global continuous solutions of hyperbolic systems of quasilinear equations;Johnson,1967