@article{IM2_1984_22_1_a1,
     author = {P. I. Katsylo},
     title = {Rationality of the orbit spaces of irreducible representations of the group~$\operatorname{SL}_2$},
     journal = {Izvestiya. Mathematics },
     pages = {23--32},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1984_22_1_a1/}
}