%0 Journal Article
%A K. N. Lungu
%T On best approximations by rational functions with a~fixed number of poles
%J Sbornik. Mathematics
%D 1971
%P 313-324
%V 15
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1971_15_2_a7/
%G en
%F SM_1971_15_2_a7