1. B. P. Sobolev, Doctoral Dissertation in Chemistry (Institute of Crystallography, Russian Academy of Sciences, Moscow, 1978).
2. B. P. Sobolev, The Rare Earth Trifluorides, Part 1: The High Temperature Chemistry of the Rare Earth Trifluorides (Institute of Crystallography, Moscow, 2000; Institut d’Estudis Catalans, Barcelona, 2000).
3. 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).
4. A. I. Gusev, Nonstoichiometry, Disorder, and Short- and Long-Range Order in Solids (Fizmatlit, Moscow, 2007) [in Russian].
5. B. P. Sobolev, Proc. the Second School of Young Scientists on the Physics Nanostructured and Crystalline Materials, Nizhni Novgorod, 2011 (Izd-vo NGU, 2011), p. 18.