1. Akaike H (1973) Information theory and an extension of the maximum likelihood principle. In: Second international symposium on information theory, pp 267–281
2. Anh NK, Tam NT, Van Linh N (2013) Document clustering using Dirichlet process mixture model of von Mises-Fisher distributions. In: Proceedings of the fourth symposium on information and communication technology, New York, pp 131–138
3. Attias H (1999) Inferring parameters and structure of latent variable models by variational Bayes. In: Proceedings of the fifteenth conference on uncertainty in artificial intelligence
4. Azzalini A, Bowman AW (1990) A look at some data on the old faithful geyser. J R Stat Soc C 39:357–365
5. Azzalini A, Menardi G (2013) Package pdfCluster: cluster analysis via nonparametric density estimation.
http://cran.r-project.org/web/packages/pdfCluster