%0 Journal Article %A A. A. Borisenko %A K. D. Drach %T Closeness to spheres of hypersurfaces with normal curvature bounded below %J Sbornik. Mathematics %D 2013 %P 1565-1583 %V 204 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2013_204_11_a1/ %G en %F SM_2013_204_11_a1