S.V. Kuznetsov, V.A. Konyushkin, A.N. Nakladov, E.V. Chernova, P.A. Popov, A.A. Pynenkov, K.N. Nishchev, and P.P. Fedorov. Thermophysical Properties of Single Crystals of CaF2–SrF2–RF3 (R = Ho, Pr) Fluorite Solid Solutions Inorganic Materials, 2020, Vol. 56, No. 9, pp. 975–981.