1. Campbell, S R (1999) ‘The problem of unity and the emergence of physics, mathematics, and logic in ancient Greek thought’ in Proceedings of the 4th International History and Philosophy of Science and Science Teaching Conference. Calgary: Department of Education, University of Calgary, 143-152.
2. ‘Learning as embodied action’;Campbell,1995
3. The number sense: How the mind creates mathematics;Dehaene,1997
4. Critique of pure reason;Kant,1965
5. Greek mathematical thought and the origin of algebra;Klein,1992