[1] G. Y. Chen,On structure of Frobenius and 2-Frobenius group, Jornal of Southwest China Normal University, 20(5) (1995), pp. 485-487.(in Chinese)
[2] J. H. Conway, R. T. Curtis, S. P. Norton, R. A. Parker and R. A. Wilson, Atlas of Finite Groups, Clarendon Press, Oxford (1985).
[3] D. Gorenstein,Finite Groups, New York, Harpar and Row, (1980).
[4] A. S. Kondratev,Prime graph components of nite simple groups, Math. Sb., 180(6) (1989), pp. 787-797.
[5] M. S. Lucido and A. R. Moghaddamfar,Groups in which all the connected components of their prime graphs are complete, Journal of Group Theory, 7(3) (2004), pp.373-384.
[6] V. D. Mazurov,Recognization of nite groups by a set of orders of their elements, Algebra and Logic, 37(6) (1998), pp.371-379.
[7] A. R. Moghaddamfar, A. R. Zokayi and M. R. Darafsheh,A characterization of nite simple groups by degrees of vertices of their prime graphs, Algebra Colloquium, 12(3) (2005), pp.431-442.
[8] D. S. Passman,Permutation Groups, New York, Benjamin Inc., (1968).
[9] J. S. Williams,Prime graph components of nite groups, J. Alg. 69(2) (1981), pp. 487-513.
[10] A. V. Zavarnitsine,Recognition of alternating groups of degrees r + 1 and r + 2 for prime r and the group of degree 16 by their element order sets, Algebra and Logic, 39(6) (2000), pp. 370-377.
[11] A. V. Zavarnitsine,Finite simple groups with narrow prime spectrum, Siberian Electronic Math. Reports. 6 (2009), pp. 1-12.