%0 Journal Article
%A D. V. Il'in
%T The Schr\"{o}dinger operator with a $\delta$-potential: The case of degenerate resonances
%J Differencialʹnye uravneniâ
%D 2000
%P 124-126
%V 36
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2000_36_1_a16/
%G ru
%F DE_2000_36_1_a16