%0 Journal Article %A Gilvan Oliveira %T Weierstrass semigroups and the canonical ideal of non-trigonal curves. %J Manuscripta mathematica %D 1991 %P 431-450 %V 71 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1991__71_3_155625/ %F MM2_1991__71_3_155625