%0 Journal Article
%A B. D. Boyanov
%T The existence of optimal quadrature formulas with given multiplicities of nodes
%J Sbornik. Mathematics
%D 1978
%P 301-326
%V 34
%N 3
%U http://geodesic.mathdoc.fr/item/SM_1978_34_3_a1/
%G en
%F SM_1978_34_3_a1