TY - JOUR AU - Wilansky, A. TI - An extension of Helly's theorem for Banach spaces JO - Portugaliae mathematica PY - 1979 SP - 139 EP - 140 VL - 38 IS - 1-2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PORMA_1979__38_1-2_115375/ LA - en ID - PORMA_1979__38_1-2_115375 ER -