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Intersection Theories and Chebyshev polynomials III., Journal of Algebra and its Applications, 8 (2009), 53-81.
Counting powers of words in monoids, European Journal of Combinatorics, 30 (2009), 1297-1308.
Fusions of character tables II: p-groups, Communications in Algebra, 27 (2009), 4296 - 4315.
Subgroups of free groups generated by conjugates of powers of the generators, Journal of Group theory, 12 (2009), 465-485.
A note on “conjugacy classes outside a normal subgroup”, Communications in Algebra, 37 (2010), 3306-3308.
Fusions of character tables III: fusions of cyclic groups and a generalisation of a condition of Camina, Israel Math Journal, 178 (2010), 325-348.