1. R. Z. Khas'minskii, The Stability of a System of Differential Equations under Random Perturbations of Their Parameters [in Russian], Nauka, Moscow (1969).
2. V. I. Klyatskin, Statistical Description of Dynamical Systems with Fluctuating Parameters [in Russian], Nauka, Moscow (1975).
3. S. M. Rytov, Introduction to Statistical Radiophysics [in Russian], Part 1, Nauka, Moscow (1976).
4. A. V. Solotov and F. S. Petrov, Linear Automatic Systems with Variable Parameters [in Russian], Nauka, Moscow (1971).
5. V. S. Pugachev, I. E. Kazakov, and L. G. Evlanov, The Foundation of the Statistical Theory of Automatic Systems [in Russian], Mashinostroenie, Moscow (1974).