%0 Journal Article
%A V. A. Il'in
%A I. Jo
%T An estimate of the difference of the partial sums of expansions corresponding to two arbitrary nonnegative selfadjoint extensions of two operators of Sturm--Liouville type for an absolutely continuous function
%J Doklady Akademii Nauk
%D 1978
%P 1381-1383
%V 243
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1978_243_6_a7/
%G ru
%F DAN_1978_243_6_a7