1. Analiz mineral’nogo syr’ya (Analysis of Mineral Raw Materials), Knipovich, Yu. N. and Morachevskii, Yu. V., Ed., Leningrad: Gos. nauch.-tekhn. izd. khim. liter, 1959.
2. Batieva, I.D. and Belkov, I.V., Sakhariokskii shchelochnoi massiv, slagayushchie ego porody I mineraly, (Sakharjok Peralkaline Massif, Component Rocks, and Minerals), Apatity, 1984.
3. Brese, N.E. and O’Keeffe, M. Bond-valence parameters for solids, Acta Cryst., 1991, vol. 47, pp. 192–197.
4. Bruker-axs. APEX2. Version 2014.11-0, Madison, 2014.
5. Bulakh, A.G., Zolotarev, A.A., and Krivovichev, V.G., Klassifikatsiya, formuly I struktura mineralov, (Classification, Formulas and Structures of Minerals), St. Petersburg: St. Petersburg University, 2003.