• Mistilings with dominos, wdg. Discrete Math., 137:361-365, 1995.
  • A computer/human Mastermind player using grids, wdg. South African Computer Journal, 30:3-8, 2003.
  • Static Mastermind, wdg. J. Combin. Math. Combin. Comput., 47:225-236, 2003.
  • Mastermind revisited, wdg. J. Combin. Math. Combin. Comput., 51:215-220, 2004.
  • Domino magic squares, M. Springfield and wdg. Bull. Inst. Combin. Appl., 52:101-108, 2008.