1. A. S. Dmitriev and A. I. Panas, Dynamical Chaos: New Information Carriers for Communication Systems (Fizmatlit, Moscow, 2002) [in Russian]
2. V. E. Demidov and N. G. Kovshikov, Pis’ma Zh. Éksp. Teor. Fiz. 66, 243 (1997) [JETP Lett. 66, 261 (1997)].
3. V. E. Demidov and N. G. Kovshikov, Pis’ma Zh. Tekh. Fiz. 24(7), 66 (1998) [Tech. Phys. Lett. 24, 274 (1998)].
4. V. E. Demidov and N. G. Kovshikov, Pis’ma Zh. Tekh. Fiz. 24(16), 54 (1998) [Tech. Phys. Lett. 24, 647 (1998)].
5. V. E. Demidov and N. G. Kovshikov, Zh. Tekh. Fiz. 69(8), 100 (1999) [Tech. Phys. 44 (1999)].