1. A. S. Andrushchak, B. G. Mytsyk, and O. V. Lyubich, Ukr. Fiz. Zh. (Russ. Ed.) 37(8), 1217 (1992).
2. A. S. Andrushchak and B. G. Mytsyk, Ukr. Fiz. Zh. (Russ. Ed.) 40(11), 1222 (1995).
3. B. G. Mytsyk, A. S. Andrushchak, N. V. Dem’yanishin, et al., Kristallografiya 41(3), 500 (1996) [Crystallogr. Rep. 41 (3), 472 (1996)].
4. B. G. Mytsyk and A. S. Andrushchak, Kristallografiya 41(6), 1054 (1996) [Crystallogr. Rep. 41 (6), 1001 (1996)].
5. N. A. Romanyuk, B. G. Mytsyk, and L. N. Kulyk, Ukr. Fiz. Zh. (Russ. Ed.) 31(3), 354 (1986).