1. Brodskaya, R.L. (1990), Mineral. Journ. (Ukraine), Vol. 12, No. 6, UA, pp. 3-7 [in Russian].
2. Vovk, O.P. and Naumko, I.М. (2014), Mineral. Journ. (Ukraine), Vol. 36, No. 1, UA, pp. 26-33 [in Ukrainian].
3. Vovk, P.K., Pavlishyn, V.I. and Sorokin, Yu.G. (1968), Mineral. sb., No. 21, Vyp. 1, UA, pp. 31-46 [in Russian].
4. Grigoriev, D.P. (1961), Ontogeny of minerals, Publ. House Lvov Univ., UA, 284 p. [in Russian].
5. Grigoriev, D.P., Evzikova, N.Z., Zidarova, B., Kostov, I., Kuznetsov, S.K., Maleev, M., Mineev, D.A., Popov, V.A., Chesnokov, B.V., Shafranovskiy I.I. and Yushkin, N.P. (1981), Crystalmorphological evolution of minerals, Ser. preprints "Scientific reports" Acad. Sci. USSR, Iss. 76, Syktyvkar, RU, 27 p. [in Russian].