1. Curtis, C. W., Reiner, I.: Representation theory of finite groups and associative algebras. New York, London: Interscience 1962
2. Dornhoff, L.: Group representation theory, Part B. New York: Marcel Dekker 1972
3. Fong, P.: On the characters ofp-solvable groups. Trans. Amer. math. Soc.98, 263?284 (1961)
4. Green, J.A.: On the indecomposable representations of a finite group. Math. Z.70, 430?445 (1959)
5. Green, J.A., Stonehewer, S.E.: The radicals of some group algebras. J. Algebra13, 137?142 (1969)