1. The stable structure of quite general linear groups;Bass, Hyman;Bull. Amer. Math. Soc.,1964
2. 2. N. Bourbaki, Éléments de mathématique. XIV, Livre II, Chap. VII, §4, 2, Theorem 1, Actualités Sci. Indust., Hermann, Paris, 1952.
3. The units of group-rings;Higman, Graham.;Proc. London Math. Soc. (2),1940