1. S. V. Manakov, Funktsion. Analiz Prilozh. 10(4), 93 (1976).
2. A. P. Veselov, Dokl. Akad. Nauk 270(6), 1298 (1983).
3. O. I. Bogoyavlenskii, Dokl. Akad. Nauk 287(5), 1105 (1986).
4. G. S. Byushgens and R. V. Studnev, Dynamics of Longitudinal and Lateral Motion (Mashinostroenie, Moscow, 1969) [in Russian].
5. M. V. Shamolin, Method of Analysis of Dynamic Systems with Variable Variance in Dynamics of Solid (Ekzamen, Moscow, 2007) [in Russian].