1. Catalog Handbook of Fine Chemicals, Aldrich Chem. Comp., 1996/1997, p. 1123.
2. Zimina, G.M., Zolotarevskii, V.I., Krasnyi, D.V., and Revina, A.A., Khim. Vys. Energ., 2004, vol. 38, no. 4, p. 260 [High Energy. Chem., 2004, vol. 38, no. 4, p. 226].
3. Platonov, A.N., Taran, M.N., and Balitskii, V.S., Priroda okraski samotsvetov (Nature of Gemstone Color), Moscow: Nedra, 1984.
4. Rau, H., Angew. Chem., 1973, vol. 85, p. 248.
5. Zimina, G.M., Zaitsev, N.K., Krasnyi, D.V., Karasev, A.L., and Vannikov, A.V., Khim. Vys. Energ., 2000, vol. 34, no. 6, p. 432 [High Energy. Chem., 2000, vol. 34, no. 6, p 376].