1. 1. S. D. Berman, "Representations of finite groups over an arbitrary field and over rings of integers," Izv. Akad. Nauk SSSR. Ser. Mat., 30, Issue 1, 69-132 (1966)
2. English translation: Amer. Math. Soc. Transl., 64, No. 2, 147-215 (1967).
3. 2. S. D. Berman, "The number of irreducible representations of a finite group over an arbitrary field," Dokl. Akad. Nauk SSSR, 106, No. 5, 767-769 (1956) (in Russian).
4. 3. S. D. Berman, P. M. Gudivok, "Indecomposable representations of finite groups over the ring of p-adic integers," Izv. Akad. Nauk SSSR. Ser. Mat., 28, No. 4, 875-910 (1964)
5. English translation: Amer. Math. Soc. Transl., 50, No. 2, 77-113 (1966).