[1] O. M. Baksalary, D. S. Bernstein and G. Trenkler, On the equality between rank and trace of an idempotent matrix, Appl. Math. Comput., 217 (2010) 4076–4080.
[2] R. E. Blahut, Algebraic Codes for Data Transmission, CUP, 2003.
[3] C. Curtis and I. Reiner, Representation Theory of Finite Groups and Associative Algebras, Amer. Math. Soc.,Chelsea, 1966.
[4] T. Hurley, Group rings and rings of matrices, Inter. J. Pure & Appl. Math., 31 (2006) 319–335.
[5] B. Hurley and T. Hurley, Paraunitary matrices and group rings, Int. J. of Group Theory, 3 (2014) 31-56.
[6] I. Martin Isaacs, Character Theory of Finite Groups, Dover, 2011.
[7] C. Polcino Milies and S. Sehgal, An introduction to Group Rings, Klumer, 2002.