%0 Journal Article %A Yu. V. Borovskii %T Two-sided closed ideals in the hyperenvelope of the Lie algebra $\mathrm{sl}(2,\mathbb{C})$ %J Doklady Akademii Nauk %D 1979 %P 265-268 %V 246 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1979_246_2_a0/ %G ru %F DAN_1979_246_2_a0