Z. Akhlaghi, K. Khedri and B. Taeri, Finite groups with K5-free prime graphs, Preprint.
 Z. Akhlaghi and H. P. Tong-Viet, Finite groups with K4-free prime graphs, Algebr. Represent. Theory, 18 (2015)
 J. H. Conway, R. T. Curtis, S. P. Norton, R. A. Parker and R. A. Wilson, Atlas of finite groups: maximal subgroups
and ordinary characters for simple groups, Clarendon Press, Oxford, England, 1985.
 M. Bianchi, D. Chillag, M. Lewis and E. Pacifici, Character degree graphs that are complete graphs, Proceedings of
the AMS, 135 (2007) 671–676.
 R. Guralnick, Subgroups of prime power index in a simple group, J. Algebra, 81 (1983) 304–311. http://dx.doi.
 B. Huppert, Endliche gruppen I, Springer-Verlag, Berlin, 1983.
 B. Huppert and W. Lempken, Simple groups of order divisible by at most four primes, Proc. of the F. Scorina
Gomel State Univ., 16 (2000) 64–75.
 I. M. Isaacs, Character theory of finite groups, AMS Chelsea, 2006.
 G. Karpilovsky, The Schur multiplier, Clarendon Press, Oxford, 1987.
 M. L. Lewis and D. L. White, Connectedness of degree graphs of nonsolvable groups, J. Algebra, 266 (2003) 51–76.
 M. L. Lewis and D. L. White, Diameters of degree graphs of nonsolvable groups, J. Algebra, 283 (2005) 80–93.
 M. L. Lewis and D. L. White, Diameters of degree graphs of nonsolvable groups II, J. Algebra, 312 (2007) 634–649.
 M. L. Lewis and J. K. McVey, Character degree graphs of automorphism groups of characteristically simple groups,
J. Group Theory, 12 (2009) 387–391.
 M. L. Lewis and D. L. White, Four-vertex degree graphs of nonsolvable groups, J. Algebra, 378 (2013) 1–11.
 M. L. Lewis, Classifying character degree graphs with five vertices, In: Finite Groups 2003, (2004) 247–265.
 M. L. Lewis and Q. Meng, Square character degree graphs yield direct products, J. Algebra, 349 (2012) 185–200.
 K. Magaard and H. P. Tong-Viet, Character degree sums in finite nonsolvable groups, J. Group Theory, 14 (2011)
 O. Manz, W. Willems and T. R. Wolf, The diameter of the character degree graph, J. Reine Angew. Math., 402
 J. K. Mc Vey, Bounding graph diameters of nonsolvable groups,J. Algebra, 282 (2004) 260–277.
 M. Meringer, Fast generation of regular graphs and construction of cages, J. Group Theory, 30 (1999) 137–146.
 A. Moret´o, Complex group algebras of finite groups: Brauer’s problem 1, Adv. Math., 208 (2007) 236–248.
 A. Moret´o and P. H. Tiep, Prime divisors of character degrees, J. Group Theory, 11 (2008) 341–356.
 P. P. P´alfy, On the character degree graph of solvable groups I: three primes, Period. Math. Hungar., 36 (1998)
 P. P. P´alfy, On the character degree graph of solvable groups, II: disconnected graphs, Studia Sci. Math. Hungar.,
38 (2001) 339–355.
 The GAP Group, GAP - Groups, Algorithms, and Programming, Version 4.8.6; 2016. http://www.gap-system.org.
 H. P. Tong-Viet, Finite groups whose prime graphs are regular, J. Algebra, 397 (2014) 18–31.
 H. P. Tong-Viet, Groups whose prime graphs have no triangles, J. Algebra, 378 (2013) 196–206.
 D. L. White, Character degrees of extensions of PSL2(q) and SL2(q), J. Group Theory, 16 (2013) 1–33.
 D. L. White, Degree graphs of simple groups, Rocky Mountain J. Math., 39 (2009) 1713–1739.
 D. L. White, Degree graphs of simple linear and unitary groups, Comm. Algebra, 34 (2006) 2907–2921.
 D. L. White, Degree graphs of simple groups of exceptional Lie type, Comm. Algebra, 32 (2004) 3641–3649.
 C. P. M. Zuccari, Regular character degree graphs, J. Algebra, 411 (2014) 215–224.