1. V. N. Zhigulev and A. M. Tumin, Onset of Turbulence [in Russian], Nauka, Novosibirsk (1987).
2. S. A. Gaponov and A. A. Maslov, Evolution of Disturbances in Compressible Flows [in Russian], Nauka, Novosibirsk (1980).
3. AIAA Paper;J. N. Hefner,1979
4. L. M. Mack, ?Boundary-layer stability theory, Part 2,? Jet Propulsion Lab. Doc, No. 900-277 (Rev. A), Pasadena, CA (1969).
5. V. R. Gushchin and A. V. Fedorov, ?Excitation and development of unstable disturbances in a supersonic boundary layer,? Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza, No. 3 (1990).