1. Bull, S., and Pain, H. (1995). ‘Did I say what I think I said, and do you agree with me?’: Inspecting and questioning the student model. In Proceedings of the World Conference on Artificial Intelligence in Education, 501–508.
2. De Buen, P., Vadera, S., and Morales, E. (1998). A multi-functional knowledge based system to learn, apply, and consult procedures. Expert Systems with Applications 15(3/4):265–275.
3. De Buen, P. (1998). An Adaptive Multi-Functional Framework To Learn, Apply and Consult Procedures, Doctoral dissertation.
4. Self, J. (1988). Bypassing the intractable problem of student modelling. In Proceedings of the Intelligent Tutoring System Conference (ITS-88), 18–24.
5. Self, J. (1994). The role of student models in learning environments. IEICE Transactions on Information and Systems E77-D(1):3–8.