%0 Journal Article %A H.W. Jr. Lenstra %T Rational Functions Invariant under a Finite Abelian Group. %J Inventiones mathematicae %D 1974 %P 299-325 %V 25 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1974__25_142292/ %F IM_1974__25_142292