%0 Journal Article %A Reichstein, Zinovy %A Youssin, Boris %T Essential Dimensions of Algebraic Groups and a Resolution Theorem for G-Varieties %J Canadian journal of mathematics %D 2000 %P 1018-1056 %V 52 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-2000-043-5/ %R 10.4153/CJM-2000-043-5 %F 10_4153_CJM_2000_043_5