Discovering clusters in databases containing mixed continuous and discrete-valued attributes. - Keith C. C. Chan; Lewis L. H. Chung (Data Mining and Knowledge Discovery: Theory, Tools, and Technology, 1999)

Discovering fuzzy clusters in databases using an evolutionary approach. - Lewis L. H. Chung; Keith C. C. Chan; Henry Leung (Data Mining and Knowledge Discovery: Theory, Tools, and Technology, 2000)