1. Benjamin, D.: Coprimeness among irreducible character degrees of finite solvable groups. Proc. Amer. Math. Soc. 125, 2831–2837 (1997)
2. Bianchi, M., Chillag, D., Lewis, M.L., Pacifici, E.: Character degree graphs that are complete graphs. Proc. Amer. Math. Soc. 135, 671–676 (2007)
3. Carter, R.W.: Finite Groups of Lie Type: Conjugacy Classes and Complex Characters. Wiley, New York (1985)
4. Conway, J.H., Curtis, R.T., Norton, S.P., Parker, R.A., Wilson, R.A.: Atlas of Finite Groups. Oxford University Press, London (1984)
5. Dornhoff, L.: Group Representation Theory, Part A: Ordinary Representation Theory. Marcel Dekker, New York (1971)