%0 Journal Article %A Conti, Roberto %T On centers of type $B$ of polynomial systems %J Archivum mathematicum %D 1990 %P 93-99 %V 26 %N 2-3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1990__26_2-3_a4/ %G en %F ARM_1990__26_2-3_a4