1. Multidimensional scaling of facial expressions;Abelson;Journal of Experimental Psychology,1962
2. Dimensions of similarity;Attneave;American Journal of Psychology,1950
3. Perception and related areas;Attneave,1962
4. The foundations of multidimensional scaling;Beals;Psychological Review,1968
5. An introduction to inequalities;Beckenback,1961