1. Lord Rayleigh,Theory of Sound(MacMillan, London, 1896) (reprinted 1940), Vol. II, Chap. 21.
2. A. B. Mikhailovoskii,Theory of Plasma Instabilities(Consultants Bureau, New York, 1974), Vol. II, p. 141.
3. Observations of Paired Electrostatic Shocks in the Polar Magnetosphere
4. The small-scale structure of electrostatic shocks
5. M. Nakamura, R. Hatakeyama, and N. Sato, inProceedings of the Second Symposium on Plasma Double Layers and Related Topics, Innsbruck, Austria, 1984 (Institute for Theoretical Physics, University of Innsbruck, Innsbruck, 1984), p. 224;