1. Motivation: What Teachers Need to Know;Ames;Teachers College,1990
2. Andrade, A., et al., (2001). A computational model of distance learning based on Vygotsky’s sociocultural approach. In Proceedings of AI-ED 2001 workshop Papers: multi-agent architectures for distributed learning environments.
3. Bercht, M., & Viccari, R. (2000). Pedagogical agents with affective and cognitive dimensions. In Proceedings of the Congreso Iberoamericnao de Informatica Educativa, Vina del Mar.
4. What is intention?;Bratman,1990
5. Descartes’ rrror;Damasio,1994