1. L. Kaufman and P. J. Rousseeuw, Finding Groups in Data: An Introduc- tion to Cluster Analysis, vol. 344. Hoboken, NJ, USA: Wiley, 2009.
2. J. Friedman, T. Hastie, and R. Tibshirani, The Elements of Statistical Learning, vol. 1, no. 10. New York, NY, USA: Springer, 2001.
3. M. W. Berry and M. Browne, Lecture Notes in Data Mining. Singapore: World Scientific, 2006.
4. S. H. Kaisler, F. J. Armour, A. Espinosa, and W. H. Money, ‘‘Big data and analytics challenges and issues,’’ 2014.
5. X. Wu, X. Zhu, G.-Q. Wu, and W. Ding, ‘‘Data mining with big data,’’