%0 Journal Article
%A V. A. Bolgov
%A A. V. Efimov
%T On the rate of summability of orthogonal series
%J Izvestiya. Mathematics 
%D 1971
%P 1399-1417
%V 5
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1971_5_6_a10/
%G en
%F IM2_1971_5_6_a10