%0 Journal Article %A P. I. Katsylo %T Rationality of the orbit spaces of irreducible representations of the group~$\operatorname{SL}_2$ %J Izvestiya. Mathematics %D 1984 %P 23-32 %V 22 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1984_22_1_a1/ %G en %F IM2_1984_22_1_a1