%0 Journal Article %A Hoffman, Peter N. %A Humphreys, John F. %T Hopf Algebras and Projective Representations of G ≀ Sn AND G ≀ An %J Canadian journal of mathematics %D 1986 %P 1380-1458 %V 38 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1986-070-1/ %R 10.4153/CJM-1986-070-1 %F 10_4153_CJM_1986_070_1