TY - JOUR AU - VeselĂ˝, Libor TI - Chebyshev centers in hyperplanes of $c_0$ JO - Czechoslovak Mathematical Journal PY - 2002 SP - 721 EP - 729 VL - 52 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMJ_2002__52_4_a4/ LA - en ID - CMJ_2002__52_4_a4 ER -