%0 Journal Article %A A. Ragusa %A G. Paxia %A G. Raciti %T On the Lüroth Semigroup of curves lying on a smooth quadric. %J Manuscripta mathematica %D 1992 %P 225-246 %V 75 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1992__75_4_155721/ %F MM2_1992__75_4_155721