1. Structure of Algebras;Albert,1939
2. Symmetric units in modular group algebras;Bovdi;Comm. Algebra,1996
3. ATLAS of Finite Groups: Maximal Subgroups and Ordinary Characters for Simple Groups;Conway,1985
4. Free groups in linear groups;de la Harpe;Enseign. Math.,1983
5. Skew Fields;Draxl,1983