1. Latent Class Analysis. Quantitative Applications in the Social Sciences Series;McCutcheon,1987
2. Latent Structure Analysis;Lazarsfeld,1968
3. Mixture Models: Inference and Application to Clustering;McLachlan,1988
4. Cluster Analysis;Everitt,1993
5. Model- based Gaussian and non-Gaussian clustering;Banfield;Biometrics,1993