1. Shapiro, A. H., The Dynamics and Thermodynamics of Fluid Flow, Ronald Press, New York, Vol.1, 1953, pp.74-78, 239.
2. Saad, M. A., Compressible Fluid Flow, Prentice-Hall, Upper SaddleRiver, NJ,1985, pp.95-99, 458-466.
3. Inviscid Laval-nozzle flowfield calculation