%0 Journal Article %A S. Yamada %T The minimal number of Seifert circles equals the braid index of a link. %J Inventiones mathematicae %D 1987 %P 347-356 %V 89 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1987__89_143484/ %F IM_1987__89_143484