%0 Journal Article %A Ya. M. Neimatov %T Spectrum of elementary excitations in compounds formed by a~rare-earth metal and a~transition metal %J Teoretičeskaâ i matematičeskaâ fizika %D 1983 %P 289-298 %V 54 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1983_54_2_a12/ %G ru %F TMF_1983_54_2_a12