1. V. D. Mazurov, “Recognition of finite simple groups S 4(q) by their element orders,” Algebra Logika, 41, No. 2, 166-198 (2002).
2. A. V. Zavarnitsine, “Exceptional action of the simple groups L 4(q) in the defining characteristic,” Sib. El. Mat. Izv., 5, 68-74 (2008); http://semr.math.nsc.ru/v5/p68-74.pdf .
3. J. H. Conway, R. T. Curtis, S. P. Norton, R. A. Parker, and R. A. Wilson, Atlas of Finite Groups, Clarendon Press, Oxford (1985).
4. R. Wilson, P. Walsh, J. Tripp, I. Suleiman, R. Parker, S. Norton, S. Nickerson, S. Linton, J. Bray, and R. Abbott, Atlas of Finite Group Representations, vers. 3; http://brauer.maths.qmul.ac.uk/Atlas/v3 .
5. The GAP Group, GAP — Groups, algorithms, and programming, vers. 4.6.5 (2013); http://www.gap-system.org .