ErmakovaJ. А., Kuznetsov, S. V., Mayakova, M. N., Voronov, V. V., Ermakov, R. P., & Fedorov, P. P. (2017). SYNTHESIS AND CHARACTERIZATION OF SrF2:Yb:Tm POWDERS. Kondensirovannye Sredy I Mezhfaznye Granitsy = Condensed Matter and Interphases, 19(1), 57-67. https://doi.org/10.17308/kcmf.2017.19/177