%0 Journal Article
%A E. A. Zavalnyuk
%T Steiner ratio for the Hadamard surfaces of curvature at most~$k<0$
%J Fundamentalʹnaâ i prikladnaâ matematika
%D 2013
%P 35-51
%V 18
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FPM_2013_18_2_a2/
%G ru
%F FPM_2013_18_2_a2