%0 Journal Article %A S. M. Tashpulatov %T Spectra and Localized Impurity States of One-Magnon Systems in the Heisenberg Isotropic Ferromagnetic Impurity Model %J Teoretičeskaâ i matematičeskaâ fizika %D 2001 %P 482-488 %V 126 %N 3 %U http://geodesic.mathdoc.fr/item/TMF_2001_126_3_a8/ %G ru %F TMF_2001_126_3_a8