A Hybrid SPC Method with the Chi-Square Distance Monitoring Procedure for Large-scale, Complex Process Data. - Nong Ye; Darshit Parmar; Connie M. Borror (Qual. Reliab. Eng. Int., 2006)

MMR: An algorithm for clustering categorical data using Rough Set Theory. - Darshit Parmar; Teresa Wu; Jennifer Blackhurst (Data Knowl. Eng., 2007)