1. Malkin, I.G.: Stability Theory of Motion. Nauka, Moscow (1966)
2. Lyapunov, A.M.: The General Problem of the Stability of Motion. Kharkov Math. Society, Kharkov (1892)
3. Kamenkov, G.V.: Stability and Oscillations of Nonlinear Systems. Collected Works, v.2. Nauka, Moscow (1972)
4. Krasinskiy A.Y.: On One Method for Studying Stability and Stabilization for Non-Isolated Steady Motions of Mechanical Systems. In Proceedings of the VIII International Seminar “Stability and Oscillations of Nonlinear Control Systems”, pp. 97–103. Inst. Probl. Upravlen, Moscow (2004).
http://www.ipuru/semin/arhiv/stab04
5. Karapetyan, A.V., Rumyantsev, V.V.: Stability of conservative and dissipative systems. Itogi Nauki i Tekhniki. General mechanics. V.6. VINITI, Moscow (1983)