%0 Journal Article %A D. S. Yasyrkina %A S. V. Kuznetsov %A A. V. Ryabova %A D. V. Pominova %A V. V. Voronov %A R. P. Ermakov %A P. P. Fedorov %T Dependence of quantum yield of up-conversion luminescence on the composition of fluorite-type solid solution NaY$_{1-x-y}$Yb$_{x}$Er$_{y}$F$_{4}$ %J Nanosistemy: fizika, himiâ, matematika %D 2013 %P 648-656 %V 4 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/NANO_2013_4_5_a6/ %G en %F NANO_2013_4_5_a6