1. Cluster Analysis;Everitt,2011
2. J. MacQueen, Some methods for classification and analysis of multivariate observations, in: Proceedings of the Fifth Berkeley Symposium on Mathematical Statistics and Probability, no. 14 in 1, Oakland, CA, USA., 1967, pp. 281–297.
3. Algorithms for Clustering Data;Jain,1988
4. Finding Groups in Data: An Introduction to Cluster Analysis, Vol. 344;Kaufman,2009
5. A density-based algorithm for discovering clusters in large spatial databases with noise.;Ester,1996