1. M. Morduchow, ?On heat transfer over a sweat-cooled surface in laminar compressible flow with a pressure gradient,?J. Aeronaut. Sci,19, 705 (1952).
2. T. K. Sirazetdinov,Optimization of Systems with Distributed Parameters [in Russian], Nauka, Moscow (1977).
3. L. S. Pontryagin, V. G. Boltyanskii, R. V. Gamkrelidze, and E. F. Mishchenko,Mathematical Theory of Optimum Processes [in Russian], Nauka, Moscow (1969).
4. N. N. Moiseev,Numerical Methods in the Theory of Optimum Systems [in Russian], Nauka, Moscow (1971).
5. A. N. Ganzhelo, ?Solution of some variational problems of two-phase gas dynamics, ?Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza, No. 1, 52 (1982).