@article{SM_1997_188_3_a0,
     author = {V. G. Boltyanskii},
     title = {Hindering systems for convex bodies},
     journal = {Sbornik. Mathematics},
     pages = {327--339},
     year = {1997},
     volume = {188},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1997_188_3_a0/}
}