%0 Journal Article
%A Yu. B. Orochko
%T Some properties of the deficiency indices of symmetric singular elliptic second-order operators in~$L^2(\mathbb R^m)$
%J Izvestiya. Mathematics 
%D 1997
%P 969-994
%V 61
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1997_61_5_a3/
%G en
%F IM2_1997_61_5_a3