References
- Kruskal , Joseph and Wish , Myron . 1978 . Multidimensional Scaling , Beverly Hills : Sage Aiblications .
- Hair , J. Jr. , Anderson , R. , Tatham , R. and Black , W. 1995 . Multivariate Data Analysis , 4th , New York : Macmillan Publishing .
- Green , Paul and Carmone , Frank . 1970 . Multidimensional Scaling , Boston : Allyn and Bacon .