%0 Journal Article %A Masataka Tomari %A Kei-ichi Watanabe %T Normal Zr-Graded Rings and Normal Cyclic Covers. %J Manuscripta mathematica %D 1992 %P 325-340 %V 76 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1992__76_1_155757/ %F MM2_1992__76_1_155757