%0 Journal Article %A V. P. Platonov %T A problem of Tannaka–Artin and groups of projective conorms %J Doklady Akademii Nauk %D 1975 %P 1299-1302 %V 222 %N 6 %U http://geodesic.mathdoc.fr/item/DAN_1975_222_6_a9/ %G ru %F DAN_1975_222_6_a9