1. G. Shuster, Deterministic Chaos, Physik Verlag, Weinheim, 1984 [Russian translation, Mir, Moscow, 1988].
2. J. Feder, Fractals, Plenum Press, New York, 1988 [Russian translation, Mir, Moscow, 1991].
3. V. S. L’vov, Nonlinear Spin Waves [in Russian], Nauka, Moscow, 1987.
4. A. I. Smirnov, Zh. Éksp. Teor. Fiz. 90, 385 (1986) [Sov. Phys. JETP 63, 222 (1986)].
5. G. Benner, R. Khein, F. Redel’shperger, and G. Vize, Izv. vyssh. uchebn. zaved., “PND” 3, 32 (1995).