1. Debye, P. and Hückel, E. Physik. Z. 24, 185 (1923).
2. Landau, L. D. and Lifshitz, E. M. Electrodynamics of Continuous Media, translated by J. B. Sykes and J. S. Bell (Addison-Wesley, Reading, MA, 1960), p. 344.
3. Dokuchaev, V. P. Soy. Atron. 8, 23 (1964).
4. Ward, G. N. Linearized Theory of High Speed Flow (Cambridge Univ. Press, Cambridge, 1955).
5. Lam, S. H. Phys. Fluids 8, 73 (1965).