1. L. Dickson, Linear Groups, Leipzig (1901).
2. O. O'Meara, "Lectures on linear groups," in: Automorphisms of the Classical Groups [Russian translation], Mir, Moscow (1976), pp. 57–167.
3. V. M. Levchuk, "Pairs of generating elements," in: Fourth All-Union Symposium on Group Theory [in Russian], Novosibirsk (1973), pp. 117–119.
4. V. M. Levchuk, "Approximation of free groups by quotients of the groups GL3 (q)," in: Some Questions of Group and Ring Theory [in Russian], Krasnoyarsk (1973), pp. 123–149.
5. D. Gorenstein, Finite Groups, New York (1968).