1. Kaminskii, A.A., Lazernye kristally (Laser Crystals), Moscow: Nauka, 1975.
2. Gaiduk, M.I., Zolin, V.F., and Gaigerova, L.S., Spektry lyuminestsentsii evropiya (Luminescence Spectra of Europium), Moscow: Nauka, 1974.
3. Hanuza, J., Macalik, L., and Hermanovich, K., Vibrational Properties of KLn(MoO4)2 Crystals for Light Rare Earth Ions from Lanthanium to Terbium, J. Mol. Struct., 1994, vol. 319, pp. 17–30.
4. Macalik, L. and Hanuza, J., Comparative Studies of Optical Properties of Eu(III) in KEu(MoO4)2 and KEu(WO4)2 Crystals, Eur. J. Solid State Inorg. Chem., 1996, vol. 33, pp. 397–410.
5. Dzhurinskii, B.F., Zorina, L.N., Lysanova, G.V., et al., Luminescent Properties of Rare-Earth Alkali-Metal Molybdates and Tungstates, Izv. Akad. Nauk SSSR, Neorg. Mater., 1980, vol. 16, no.1, pp. 110–113.