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  3. T. Hawkes, I. M. Isaacs, and M. Özaydin, On the Möbius function of a finite group, Rocky Mountain J. Math. 19 (1989), no. 4, 1003–1034.[MR]
  4. I. M. Isaacs, Counting characters of upper triangular groups, J. Algebra 315 (2007), no. 2, 698–719.[MR]
  5. I. M. Isaacs and Dikran Karagueuzian, Conjugacy in groups of upper triangular matrices, J. Algebra 202 (1998), no. 2, 704–711.[MR]
  6. I. M. Isaacs and Dikran Karagueuzian, Erratum: "Conjugacy in groups of upper triangular matrices" [J. Algebra 202 (1998), no. 2, 704–711; MR1617655 (99b:20011)], J. Algebra 208 (1998), no. 2, 722.[MR]
  7. I. M. Isaacs and Dikran B. Karagueuzian, Involutions and characters of upper triangular matrix groups, Math. Comp. 74 (2005), no. 252, 2027–2033 (electronic).[MR]
  8. I. M. Isaacs and Tom Wilde, Primitive characters of maximal subgroups of solvable groups, J. Algebra 323 (2010), no. 2, 419–436.[MR/doi]