%0 Journal Article %A I. Yu. Popov %T Short-range potential and a~model of the theory of extensions of operators for a~resonator with a~semitransparent boundary %J Matematičeskie zametki %D 1999 %P 703-711 %V 65 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1999_65_5_a7/ %G ru %F MZM_1999_65_5_a7