%0 Journal Article %A Z. N. Ovsyannikov %T The Steiner and Gromov--Steiner ratios and Steiner subratio in the space of compacta in the Euclidean plane with Hausdorff distance %J Fundamentalʹnaâ i prikladnaâ matematika %D 2013 %P 157-165 %V 18 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/FPM_2013_18_2_a12/ %G ru %F FPM_2013_18_2_a12