1. G. G. Hänisch, Electroluminescence [Russian translation], Mir, Moscow, 1964.
2. Yu. P. Chukova, Collection: Optics and Spectroscopy,1. Luminescence [in Russian], p. 339, 1963.
3. Yu. P. Chukova and V. D. Ligasova, Opt. i spektr.,18, 846, 1965.
4. Yu. P. Chukova, Opt. i spektr.,18, 1035, 1965.
5. B. P. Aseev, Oscillating Circuits [in Russian], Gosizdat, Moscow, 1955.