TY - JOUR AU - P. I. Katsylo TI - Rationality of fields of invariants of reducible representations of the group $\mathrm{SL}_2$ JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 1984 SP - 77 EP - 79 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_1984_5_a20/ LA - ru ID - VMUMM_1984_5_a20 ER -