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Author: Lai, C. K.

• Lai, C. K.; Shum, K. P.: A note in inverse and dual semigroups. (English). Czechoslovak Mathematical Journal, vol. 42 (1992), issue 1, pp. 7-10
• Lai, C. K.; Shum, Kar-Ping: Characterizations of dual semigroups. (English). Czechoslovak Mathematical Journal, vol. 39 (1989), issue 4, pp. 578-584