1. V. S. Anishchenko, V. V. Astakhov, T. E. Vadivasova, A. B. Neiman, G. I. Strelkova, and L. Shimanskii-Gaier, Nonlinear Dynamics of Chaotic and Stochastic Systems: Tutorial and Modern Developments (Inst. Komp’yut. Issled., Moscow-Izhevsk, 2003; Springer, Berlin, 2003).
2. S. P. Kuznetsov, Dynamical Chaos (Fizmatlit, Moscow, 2006) [in Russian].
3. A. S. Mikhailov and A. Yu. Loskutov, Foundation of Synergetics II: Complex Patterns (Springer, Berlin, 1993; NITS RKhD, Izhevsk, 2008).
4. P. D’Odorico, F. Laio, and L. Ridolfi, Proc. Natl. Acad. Sci. USA 102, 10819 (2005).
5. R. A. Ibrahim, J. Vib. Control 12, 1093 (2006).