%0 Journal Article %A V. G. Boltyanskii %T Hindering systems for convex bodies %J Sbornik. Mathematics %D 1997 %P 327-339 %V 188 %N 3 %U http://geodesic.mathdoc.fr/item/SM_1997_188_3_a0/ %G en %F SM_1997_188_3_a0