%0 Journal Article
%A V. A. Il'in
%A Sh. A. Alimov
%T Conditions for the convergence of spectral decompositions that correspond to self-adjoint extensions of elliptic operators. I. Self-adjoint extension of the Laplace operator with a point spectrum
%J Differencialʹnye uravneniâ
%D 1971
%P 670-710
%V 7
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1971_7_4_a9/
%G ru
%F DE_1971_7_4_a9