@article{CM_1989__71_2_181_0,
     author = {Ruitenburg, G. C. M.},
     title = {Invariant ideals of polynomial algebras with multiplicity free group action},
     journal = {Compositio Mathematica},
     pages = {181--227},
     publisher = {Kluwer Academic Publishers},
     volume = {71},
     number = {2},
     year = {1989},
     mrnumber = {1012639},
     zbl = {0729.22013},
     language = {en},
     url = {http://www.numdam.org/item/CM_1989__71_2_181_0/}
}