1. Stephen P. Humphries and Kenneth W. Johnson, Fusions of character tables and Schur rings of abelian groups, Comm. Algebra 36 (2008), no. 4, 1437–1460.[MR]
  2. Stephen P. Humphries and Kenneth W. Johnson, Fusions of character tables II. p-groups, Comm. Algebra 37 (2009), no. 12, 4296–4315.[MR/doi]