%0 Journal Article
%A E. A. Sevast'yanov
%T Haar problem for sign-sensitive approximations
%J Sbornik. Mathematics
%D 1997
%P 265-297
%V 188
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1997_188_2_a4/
%G en
%F SM_1997_188_2_a4