1. Recent Work on the Flow of Compressible Fluids;Taylor, G. I.;J. London Math. Soc.,1930
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3. The “limiting line” in mixed subsonic and supersonic flow of compressible fluids;Tsien, Hsue-shen;Tech. Notes Nat. Adv. Comm. Aeronaut.,1944
4. Gas motion in a local supersonic region and conditions of break of potential flow;Nikolsky, A. A.;Appl. Math. Mech. [Akad. Nauk SSSR. Prikl. Mat. Mech.],1946
5. On the non-occurrence of a limiting line in transonic flow;Friedrichs, K. O.;Communications on Appl. Math.,1948