%0 Journal Article
%A A. S. Tsareva
%T Sufficient condition of Hilbertness of some eigenfunctions systems of the second order differential operator
%J Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences
%D 2007
%P 158-161
%V 115
%N 2
%U http://geodesic.mathdoc.fr/item/VSGTU_2007_115_2_a22/
%G ru
%F VSGTU_2007_115_2_a22