1. G. Grüner, Density Waves in Solids, Addison-Wesley, Reading, Mass. 1994.
2. S. A. Brazovskii, JETP Lett. 28, 606 (1978); Zh. Éksp. Teor. Fiz. 78, 678 (1980) [Sov. Phys. JETP 51, 342 (1980)].
3. W. P. Su, J. R. Schrieffer, and A. J. Heeger, Phys. Rev. Lett. 42, 1698 (1979).
4. M. E. Itkis and F. Ya. Nad’, Synthetic Metals 29, F421 (1989).
5. S. N. Artemenko and A. F. Volkov, Zh. Éksp. Teor. Fiz. 81, 1872 (1981) [Sov. Phys. JETP 54, 992 (1981)].