%0 Journal Article %A Zh. I. Abdullaev %T Bound states and resonances of the energy operator of a~single-magnon spin-polaron system %J Teoretičeskaâ i matematičeskaâ fizika %D 1991 %P 420-424 %V 86 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1991_86_3_a10/ %G ru %F TMF_1991_86_3_a10