1. S. A. Losev, Gas-Dynamic Lasers [in Russian], Nauka, Moscow (1977).
2. R. I. Soloukhin and N. A. Fomin, ?Inversion measurement of a flow with gasdynamic perturbations,? Dokl. Akad. Nauk SSSR,228, No. 3, 596?599 (1976).
3. J. Anderson, Gasdynamic Lasers: an Introduction [Russian translation], Mir, Moscow (1979).
4. N. A. Fomin and R. I. Souloukhin, ?Gasdynamic problems for optically inverse media,? Rev. Phys. Appliquée,14, No. 2, 421?431 (1979).
5. A. S. Biryukov, R. I. Serikov, and A. M. Starik, ?Effects of weak flow perturbations on the gain parameter of a gasdynamic laser,? Kvantovaya Elektron.,6, No. 5, 911?916 (1979).