1. Diagnostic and statistical manual of mental disorders;American Psychiatric Association,2000
2. The instability of graded structure: Implications for the nature of concepts;Barsalou,1987
3. How diagrams can improve reasoning;Bauer;Psychological Science,1993
4. A study of thinking;Bruner,1956
5. Strategies in syllogistic reasoning;Bucciarelli;Cognitive Science,1999