1. Hydrodynamics;Lamb,1945
2. Supersonic Flow and Shock Waves;Courant,1948
3. A class of three dimensional compressible fluid flows;Wasserman;J. Math. Anal. Appl.,1962
4. Steady rotational flow of ideal gases;Prim;J. Rational Mech. Anal.,1952
5. Differential Geometry of Three Dimensions;Weatherburn,1955