1. Clustering Numerical and Categorical Data. Internal Report, Faculdade Salesiana Maria Auxiliadro, Rio de Janeiro; 2004.
2. , , . Clustering categorical data. In: Proc 16th Int Conf on Data Engineering, San Diego, CA, February 28–March 3, 2000. p 305.
3. , . A CSA-based clustering algorithm for large data sets with mixed numeric and categorical values. In: Fifth World Congress on Intelligent Control and Automation, WCICA, Hangzhou, China, June 15–19, 2004. pp 2303–2307.
4. . Fuzzy clustering with a fuzzy covariance matrix. In: Proc 1978 IEEE Conf on Decision and Control Including the 17th Symp on Adaptive Processes, San Diego, CA, January 10–12, 1979. pp 761–766.
5. . Fuzzy clustering of incomplete nominal and numerical data. In: Fifth World Congress on Intelligent Control and Automation, WCICA, Hangzhou, China, June 15–19, 2004. pp 2331–2334.