1. Haung, Z.: Extensions to the k-Means Algorithm for Clustering Large Data Sets with Categorical Values. Canberra, ACT 2601, Australia (1998)
2. He, Z., Deng, S., Xu, X.: Improving K-Modes Algorithm Considering Frequencies of Attribute Values in Mode. Harbin Institute of Technology, China (2005)
3. Haung, Z.: A Fast Clustering Algorithm to Cluster Very Large Categorical Data Sets in Data Mining
4. Sayal, R., Vijay Kumar, V.: A Novel Similarity Measure for Clustering Categorical Data Sets. International Journal of Computer Applications (2011)
5. Witten, I., Frank, E.: Data Mining: Practical Machine Learning Tools and Techniques (2011)