%0 Journal Article
%A L. D. Ivanov
%T On approximation of $l$-smooth functions by rational functions in the integral metric
%J Izvestiya. Mathematics 
%D 1972
%P 235-240
%V 6
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1972_6_1_a6/
%G en
%F IM2_1972_6_1_a6