1. R.W. Carter, Finite Groups of Lie Type-Conjugacy Classes and Complex Characters, John Wiley & Sons, 1993.
2. Conway J. H., Curtis R. T., Norton S. P., Parker R. A., Wilson R. A.: Atlas of finite groups. Oxford University Press, Oxford (1985)
3. B. Hartley, A general Brauer-Fowler Theorem and centralizers in locally finite groups, Pacific J. Math 152 (1992), 101–117.
4. Ersoy K.: Infinite groups with an anticentral element, Comm. Algebra 40, 4627–4638 (2012)
5. Yu. M. Gorchakov: Infinite Frobenius groups. Algebra Logika 4, 1529 (1965)