1. Lecture Notes in Computer Science;L. Anthony,2004
2. Baghaei, N., Mitrovic, A., Irwin, W.: A Constraint-Based Tutor for Learning Object-Oriented Analysis and Design using UML. In: Looi, C.K., Jonassen, D., Ikeda, M. (eds.) Int. Conf. Computers in Education ICCE 2005, pp. 11–18 (2005)
3. Corbett, A., Wagner, A., Chao, C., Lesgold, S., Stevens, S., Ulrich, H.: Student Questions in a Classroom Evaluation of the ALPS Learning Environment. In: Looi, C.-K., McCalla, G., Bredeweg, B., Breuker, J. (eds.) Proc. 12th Int. Conf. Artificial Intelligence in Education, pp. 780–782 (2005)
4. Elmasri, R., Navathe, S.: Fundamentals of Database Systems. Addison-Wesley, Reading (2004)
5. LNAI;A. Mitrović,2001