1. Sedov, L. I., Similarity and Dimensional Methods in Mechanics (Academic Press, New York, 1959), pp.271-281.
2. Spherical, cylindrical and one-dimensional gas flows
3. Courant, R. and Friedricks, K. O., Supersonic Flow and Shock Waves (Interscience Publishers, New York, 1948), pp.191-195.
4. Expansion of a Rarefield Gas Cloud into a Vacuum