%0 Journal Article %A Sh. A. Alimov %A V. A. Il'in %T Conditions for the convergence of spectral decompositions that correspond to self-adjoint extensions of elliptic operators. II. Self-adjoint extension of the Laplace operator with an arbitrary spectrum %J Differencialʹnye uravneniâ %D 1971 %P 851-882 %V 7 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1971_7_5_a8/ %G ru %F DE_1971_7_5_a8