@article{GDZPPN00223517X,
title = {When is a Ring of Torus Invariants a Polynomial Ring?},
journal = {Manuscripta mathematica},
volume = {83},
year = {1994},
pages = {161-170},
zbl = {0809.14008},
url = {http://dml.mathdoc.fr/item/GDZPPN00223517X}
}
Wehlau, David L. When is a Ring of Torus Invariants a Polynomial Ring?. Manuscripta mathematica, Tome 83 (1994) pp. 161-170. http://gdmltest.u-ga.fr/item/GDZPPN00223517X/