%0 Journal Article
%A A. G. Babenko
%T An exact Jackson--Stechkin inequality for $L^2$-approximation on the interval with the Jacobi weight and on projective spaces
%J Izvestiya. Mathematics 
%D 1998
%P 1095-1119
%V 62
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1998_62_6_a1/
%G en
%F IM2_1998_62_6_a1