1. The end of time;Barbour,1999
2. An extension of semantic space;Bentler;Journal of Verbal Learning and Verbal Behavior,1972
3. Gardner, H. (1983) Frames of mind: The theory of multiple intelligence. Basic.
4. Chaos and complexity in psychology;Guastello,2009
5. The science of sex differences in science and mathematics;Halpern;Psychological Science in the Public Interest,2007