1. Semisimple Elements in Group Algebras;Alexander;Comm. Algebra,1993
2. Fields and Rings;Kaplansky,1969
3. Brauer Group Rings;Lundström,2002
4. Left and Right Inverses in Group Algebras;Montgomery;Bull. AMS,1969
5. Direct finiteness of certain monoid algebras;Munn,1996