%0 Journal Article
%A L. Yu. Kolotilina
%T Optimally conditioned block $2\times2$ matrices
%J Zapiski Nauchnykh Seminarov POMI
%D 2000
%P 72-85
%V 268
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_2000_268_a4/
%G ru
%F ZNSL_2000_268_a4