1. A. F. Khokhlov, A. I. Mashin, and D. A. Khokhlov, Vestn. NO Ross. Akad. Estestv. Nauk 2, 191 (1998)
2. P. F. Schewe and B. Stein, Physics News Update, The American Institute of Physics Bulletin of Physics News (1998), No. 338, Story 3.
3. The Physics of Hydrogenated Amorphous Silicon, Vol. 2: Electronic and Vibrational Properties, Ed. by J. D. Joannopoulos and G. Lucovsky, with contributions by D. E. Carlson et al. (Springer-Verlag, New York, 1984; Mir, Moscow, 1988).
4. K. K. Shvarts, Physics of Optical Recording in Dielectrics and Semiconductors (Zinatne, Riga, 1986).
5. A. I. Gubanov, Quantum Electron Theory of Amorphous Conductors (Akad. Nauk SSSR, Moscow, 1963; Consultants Bureau, New York, 1965).