AHMAD, N.; RADIN UMAR, R.; HALIM, I.; MOHAMED, M.; JAMLI, M. R.; BAHARUDIN, M. S.; HAMID, M. Evaluation of Menu Hierarchy Display Types in Self-Checkout System: Effects on Human Performance. Journal of Advanced Manufacturing Technology (JAMT), v. 12, n. 1(1), p. 371-382, 11.