L. N. Ignatieva, N. N. Savchenko, Y. V. Marchenko, V. A. Mashchenko, V. M. Bouznik, “Raman study of glasses in the NbO$_{2}$F-BaF$_{2}$-InF$_{3}$-ErF$_3$ and CdNbOF$_{5}$-BaF$_{2}$-InF$_{3}$ systems”, Nanosystems: Physics, Chemistry, Mathematics, 11:3 (2020), 333–337
