%0 Journal Article
%A N. M. Gulevich
%A S. V. Konyagin
%A R. V. Rakhmankulov
%T Fixed points and differentiability of the norm
%J Sbornik. Mathematics
%D 1989
%P 461-469
%V 64
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1989_64_2_a11/
%G en
%F SM_1989_64_2_a11