A fuzzy expert system shell: From minicomputer to PC. - Kwong-Sak Leung; Y. T. So; Ares Leung; W. S. Felix Wong (Artif. Intell. Medicine, 1992)

Consistency checking for fuzzy expert systems. - Kwong-Sak Leung; Y. T. So (Int. J. Approx. Reason., 1993)