[1] Mark W. Bissler and Mark L. Lewis, A family of graphs that cannot o ccur as character degree graphs of solvable
groups, (2017).
[2] B. Hupp ert, End liche gruppen. I , Die Grundlehren der Mathematischen Wissenschaften, 134 , Springer-Verlag, Berlin-
New York, 1967.
[3] I. Martin Isaacs, Character theory of nite groups , Dover Publications, Inc., New York, Corrected reprint of the 1976
original Academic Press, New York, 1994.
[4] M. L. Lewis, Solvable groups whose degree graphs have two connected comp onents. J. Group Theory , 4 (2001)
255{275.
[5] M. L. Lewis, Solvable groups with character degree graphs having 5 vertices and diameter 3, Comm. Algebra , 30
(2002) 5485{5503.
[6] M. L. Lewis, Classifying character degree graphs with 5 vertices , Finite groups 2003, Walter de Gruyter, Berlin, 2004
247{265.
[7] M. L. Lewis, An overview of graphs asso ciated with character degrees and conjugacy class sizes in nite groups, Rocky Mountain J. Math. , 38 (2008) 175{211.
[8] Peter Pal Palfy, On the character degree graph of solvable groups I .Three primes, Period. Math. Hungar. , 36 (1998)
61{65.
[9] C. B. Sass, Character degree graphs of solvable groups with diameter three, J. Group Theory , 19 (2016) 1097{1127.
)
