1. Titterington, D.M., Smith, A.F.M., Markov, U.E.: Statistical Analysis of Finite Mixture Distributions. Wiley, New York (1985)
2. McLachlan, G.J., Peel, D.: Finite Mixture Models. Wiley, New York (2000)
3. Dempster, A.P., Laird, N.M., Rubin, D.B.: Maximum-likelihood from incomplete data via the EM algorithm. J. Roy. Stat. Soc. Ser. B 39, 1–38 (1977)
4. Aitkin, M., Wilson, G.T.: Mixture models, outliers, and the EM algorithm. Technometrics 22, 325–331 (1980)
5. Scott, D.W.: On fitting and adapting of density estimates. Comput. Sci. Stat. 30, 124–133 (1998). (Weisberg, S., ed.)