1. L. I. Sedov, Mechanics of Continuous Media, Vol. 1 [in Russian], Nauka, Moscow (1973).
2. R. I. Nigmatulin, Fundamentals of the Mechanics of Heterogeneous Media [in Russian], Nauka, Moscow (1978).
3. S. L. Loo, Dynamics of Charged Suspensions (Intern. Reviews in Aerosol Physics and Chemistry, Vol. 2), Pergamon Press, Oxford (1971).
4. L. Cheng and S. L. Soo, ?Charging of dust particles by impact,? J. Appl. Phys.41, No. 2 (1970).
5. B. G. Popov, V. N. Verevkin, V. A. Bondar', and V. I. Gorshkov, Static Electricity in the Chemical Industry [in Russian], Khimiya, Leningrad (1971).