%0 Journal Article %A Günter M. Ziegler %T On the difference between real and complex arrangements. %J Mathematische Zeitschrift %D 1993 %P 1-12 %V 212 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1993__212_4_174469/ %F MZ_1993__212_4_174469