%0 Journal Article %A Yu. D. Burago %T An estimate from below for the spatial diameter of a~surface in terms of its intrinsic radius and curvature %J Sbornik. Mathematics %D 1971 %P 405-414 %V 15 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1971_15_3_a2/ %G en %F SM_1971_15_3_a2