@article{VMUMM_1984_5_a20,
     author = {P. I. Katsylo},
     title = {Rationality of fields of invariants of reducible representations of the group $\mathrm{SL}_2$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {77--79},
     publisher = {mathdoc},
     number = {5},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1984_5_a20/}
}