%0 Journal Article
%A G. I. Laptev
%T Boundary value problems for second order differential equations in Hilbert space with a variable selfadjoint operator
%J Doklady Akademii Nauk
%D 1968
%P 283-286
%V 179
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1968_179_2_a8/
%G ru
%F DAN_1968_179_2_a8