1. Thomson, J.M.T., Instability and Catastrophes in Science and Technology, New York: Wiley, 1982. Translated under the title Neustoichivost’ i katastrofy v nauke i tekhnike, Moscow: Mir, 1985.
2. Lyapunov, A.M., Obshchaya zadacha ob ustoichivosti dvizheniya (The Common Problem on Stability of Motion), Moscow: GITTL, 1950.
3. Mitropol’skii, Yu.A., Metody nelineinoi mekhaniki (Methods of Nonlinear Mechanics), Kiev: Naukova Dumka, 2005.
4. Chetaev, N.G., Ustoichivost’ dvizheniya (Stability of Motion), Moscow: Nauka, 1965, 3rd ed.
5. Andronov, A.A., Vitt, A.A., and Khaikin, S.E., Teoriya kolebanii (Theory of Oscillations), Moscow: Nauka, 1981.