1. The 2-adic representations of Klein's four group;Butler,1974
2. The Representation Theory of Finite Groups;Feit,1982
3. Schur indices and abelian defect groups;Geline;J. Algebra,2008
4. On the vertices of irreducible modules;Knörr;Ann. of Math. (2),1979
5. Virtually irreducible lattices;Knörr;Proc. London Math. Soc. (3),1989