%0 Journal Article
%A K. I. Babenko
%T On summability and convergence of eigenfunction expansions of a diffe­rential operator
%J Sbornik. Mathematics
%D 1973
%P 157-211
%V 20
%N 2
%U http://geodesic.mathdoc.fr/item/SM_1973_20_2_a0/
%G en
%F SM_1973_20_2_a0