%0 Journal Article
%A P. A. Borodin
%T Quasiorthogonal sets and conditions for a~Banach space to be a~Hilbert space
%J Sbornik. Mathematics
%D 1997
%P 1171-1182
%V 188
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1997_188_8_a3/
%G en
%F SM_1997_188_8_a3