1. Notes on a differential equation which occurs in the two-dimensional motion of a compressible fluid and the associated variational problems;Bateman;Proc. Roy. Soc.,1928
2. Eine neue Stromungsfunktion fur die Erforschung der Case mit Rotation,;Crocco;ZaMM,1937
3. New formulations of the equations for compressible flows;Hicks;Quart. Appl. Math.,1947
4. A new variational principle for isoenergetic flows;Lin;Naval Ordnance Laboratory Memorandum 10365,1949
5. On the flow behind curved shocks;Lin;Journal of Math. and Physics,1948