1. B. P. Sobolev, The Rare Earth Trifluorides, Part 2: Introduction to Materials Science of Multicomponent Metal Fluoride Crystals (Institute of Crystallography, Moscow, 2001; Institut d’Estudis Catalans, Barcelona, 2001).
2. P. P. Fedorov and V. V. Osiko, Bulk Crystal Growth of Electronic, Optical, and Optoelectronic Materials, Ed. by P. Capper, Wiley Series in Materials for Electronic and Optoelectronic Applications (Wiley, 2005), p. 339.
3. P. P. Fedorov, Russ. J. Inorg. Chem. 45 (Suppl. 3), S268 (2000).
4. P. A. Popov, N. V. Moiseev, D. N. Karimov, et al., Crystallogr. Rep. 60 (1), 116 (2015).
5. I. V. Murin, Izv. SO Akad. Nauk CCCP, Ser. Khim. Nauk 1, 53 (1984).