Character Correspondence in Finite General Linear, Unitary and Symmetric Groups. G.O. Michler; J.B. Olsson — 1983 Mathematische Zeitschrift
The Alperin-McKay conjecture holds in the covering groups of symmetric and alternating groups, p ... 2. G.O. Michler; J.B. Olsson — 1990 Journal für die reine und angewandte Mathematik