1. V. P. Chernenko, F. N. Zaitov, and Yu. L. Lukantsever, Optika i spektroskopiya,15, 109, 1963.
2. V. P. Chernenko, Yu. L. Lukantsever, and F. N. Zaitov, Izv. VUZ. Fizika [Soviet Physics Journal], no. 5, 97, 1965.
3. V. V. Antonov-Romanovskii, Izv. AN SSSR, ser. fiz.,10, 460, 1946.
4. Yu. L. Lukantsever, Dissertation, Tomsk, 1959.
5. B. V. Budylin and A. A. Vorob'ev, Effect of Radiation on Ionic Structures [in Russian], Gosatomizdat, Moscow, 1962.