On modular and integral representation algebras on finite groups
Izvestiya. Mathematics , Tome 7 (1973) no. 5, pp. 963-989.

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This paper contains a solution to the semisimplicity problem for modular and integral representation algebras of finite groups over an arbitrary field.
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P. M. Gudivok; V. P. Rud'ko. On modular and integral representation algebras on finite groups. Izvestiya. Mathematics , Tome 7 (1973) no. 5, pp. 963-989. http://geodesic.mathdoc.fr/item/IM2_1973_7_5_a0/

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