1. Nemov, S.A., Marchenko, A.V., and Seregin, P.P., Parameters of Luminescence and the Local Structure of Eu3+ Centers in Fluorogermanate Glasses, Fiz. Khim. Stekla, 2008, vol. 34, no. 1, pp. 61–65 [Glass Phys. Chem. (Engl. transl.), 2008, vol. 34, no. 1, pp. 47–49].
2. Seregin, P.P., Fizicheskie osnovy messbauerovskoi spektroskopii (Physical Principles of Mössbauer Spectroscopy), St. Petersburg: St. Petersburg State Polytechnical University, 2002 [in Russian].
3. Coey, J.M.D. and McEvoy, A., Mössbauer Study of Europium in Fluorozirconate Glass, J. Non-Cryst. Solids, 1981, vol. 43, no. 3, pp. 387–392.
4. Khalilev, V.D., Seregin, P.P., Saidov, Ch.S., Grigoryan, T.M., Anisonyan, L.B., and Agzamov, A., The Valence State of Iron, Europium, and Tin Atoms in Fluoride Glasses, Fiz. Khim. Stekla, 1987, vol. 13, no. 5, pp. 779–781.
5. Tanabe, S., Hirao, K., and Soga, N., Local Structure of Rare-Earth Ions in Fluorophosphate Glasses by Phonon Sideband and Mössbauer Spectroscopy, J. Non-Cryst. Solids, 1992, vol. 142, nos. 1–2, pp. 148–154.