%0 Journal Article %A Ruitenburg, G. C. M. %T Invariant ideals of polynomial algebras with multiplicity free group action %J Compositio Mathematica %D 1989 %P 181-227 %V 71 %N 2 %I Kluwer Academic Publishers %U http://www.numdam.org/item/CM_1989__71_2_181_0/ %G en %F CM_1989__71_2_181_0