[4] Dixon M.R., Kurdachenko L.A., Otal J.: 
Linear analogues of theorems of Schur, Baer and Hall. Int. J. Group Theory 2 (2013), no. 1, 79–89. 
MR 3033535 | 
Zbl 1306.20055[5] Hall P.: 
Nilpotent groups. Notes of lectures given at the Canadian Math. Congress, University of Alberta, August 1957, pp. 12–30. 
Zbl 0211.34201[6] Kargapolov M.I., Merzlyakov Yu.I.: 
Fundamentals of the theory of groups. Nauka, Moscow, 1982. 
MR 0677282[7] Kurdachenko L.A., Otal J.: 
The rank of the factor-group modulo the hypercenter and the rank of the some hypocenter of a group. Cent. Eur. J. Math. 11 (2013), no. 10, 1732–1741. 
MR 3080231 | 
Zbl 1316.20039[8] Kurdachenko L.A., Otal J., Subbotin I.Ya.: 
Artinian Modules over Group Rings. Frontiers in Mathematics, Birkhäuser, Basel, 2007, 248 p. 
MR 2270897 | 
Zbl 1110.16001[11] Neumann B.H.: 
Groups with finite classes of conjugate elements. Proc. London Math. Soc. 1 (1951), 178–187. 
MR 0043779 | 
Zbl 0043.02401[12] Robinson D.J.S.: 
Finiteness Conditions and Generalized Soluble Groups. Part 1. Springer, Berlin, 1972, xv+210 pp. 
MR 0332989 | 
Zbl 0243.20033[14] Schur I.: 
Über die Darstellungen der endlichen Gruppen durch gebrochene lineare substitutionen. J. reine angew. Math., 127 (1904), 20–50. 
MR 1580631[15] Stewart I.N.: 
Verbal and marginal properties of non-associative algebras in the spirit of infinite group theory. Proc. London Math. Soc. 28 (1974), 129–140. 
MR 0338095