1. Baker, F.B. (1974) Stability of two Hierarchical Grouping Techniques
Case I: Sensitivity to Data Errors. Journal of the American Statistical Association, 69, 440445
2. Bock, H.H. (1974) Automatische Klassifikation. Vandenhoek and Ruprecht, Göttingen
3. Buneman, P. (1971) The Recovery of Trees from Measures of Dissimilarity. In: Hodson, F.R., Kendall, D.G. and Tautu, P. (eds) Mathematics in the Archaeological and Historical Sciences. Edinburgh University Press, 387–395
4. Carroll, J.D. and Pruzansky, S. (1980) Discrete and Hybrid Scaling Methods. In: it. Lantermann, E.D. and Feger, H. (eds) Similartity and Choice. Huber, Bern, 108–139
5. Cook, R.D. and Weisberg, S. (1982) Residuals and Influence in Regression. Chapman and Hall, New York