1. G. M. Bartenev, Structure and Mechanical Properties of Glass [in Russian], Stroiizdat, 1966.
2. V. V. Tarasov, New Problems in the Physics of Glass [in Russian], Stroiizdat, 1959.
3. J. M. Stevels, Handbuch der Physik, XX, Springer Verlag, 1957.
4. N. I. Ananich and O. K. Botvinkin, The Vitreous State [in Russian], Izd. Nauka, 119?121, 1965.
5. É. K. Keler and E. I. Kozlovskaya, ZL, no. 6, 1954.