1. B. W. Schumacher and E. O. Gadamer, ?Electron beam fluorescence probe for measuring the local gas density in a wide field of observation,? Canad. J. Phys., vol. 36, no. 6, 1958.
2. A. M. Trokhan, ?Measurement of the parameters of gas flows using a beam of fast electrons,? PMTF, no. 3, p. 81, 1964.
3. E. M. Winkler, ?Methods based on electrical discharge phenomena and afterglow,? collection: Physical Measurements in Gas Dynamics and Combustion [in Russian], Izd-vo inostr. lit., Moscow, 1957.
4. H. I. Bomelburg, ?A new glow-discharge method for flow visualization in supersonic wind tunnels,? Jo Aerospace Sci., vol. 25, no. 11, 1958.
5. F. E. Goven and V. D. Hopkins, ?Wind tunnel with electric arc air heating designed to obtain speeds with Mach numbers in the range from 10 to 20;? collection: Modern Aerodynamic Investigation Techniques for Hypersonic Speeds [Russian translation], A. M. Krill, ed., Mashgiz, Moscow, 1965.