1. I. A. Tikhomirov et al., Inventor's Certificate No. 416617, Byull. Izobret., No. 7 (1974).
2. G. S. Aravin, Yu. K. Karasevich, P. A. Vlasov et al., Proc. XV Int. Conf. on Phenomena in Ionized Gases, Minsk (1981), Pt. II.
3. I. L. Pankrat'eva and V. A. Polyanskii, Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza, No. 2, 102 (1979).
4. Lin and Teare, Voprosy Raketn. Tekh.,5, 16 (1964).
5. C. F. Hansen, Phys. Fluids,11, 904 (1968).