Authors: John Yen Jonathan Lee

Citation: John Yen et Jonathan Lee, A task-based methodology for specifying expert systems, IEEE expert IEEE expert intelligent systems and their applications , 8(1), 1993, pp. 8-16

Authors: John Yen Hsiao-Lei Juang Robert MacGregor

Citation: John Yen et al., Using polymorphism to improve expert system maintainability, IEEE expert IEEE expert intelligent systems and their applications , 6(2), 1991, pp. 48-55