1. Categorization — Natural Language and Design;Athavankar;Design Issues,1989
2. The Effect of Color, Graphics and Form, a Pilot Study;Burden;Innovation,1984
3. Function and Sign: The Semiotics of Architecture;Eco,1980
4. Multidimensional Scaling: Concepts and Applications;Green,1989
5. Product Semantics: Exploring the Symbolic Qualities of Form;Krippendorff;Innovation,1984