%0 Journal Article %A G. N. Gestrin %T Expansion in characteristic functions of the Schr\"odinger operator with a~singular potential %J Matematičeskie zametki %D 1974 %P 455-465 %V 15 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1974_15_3_a12/ %G ru %F MZM_1974_15_3_a12