1. Cooper, T.B., Kingston, J.H.: The complexity of timetable construction problems. In: Proceedings of the First International Conference on the Practice and Theory of Automated Timetabling (ICPTAT 1995), pp. 511–522 (1995)
2. Lecture Notes in Computer Science;Z. Bratković,2009
3. Dorigo, M., Stutzle, T.: Ant Colony Optimization. In: Bradford Books. The MIT Press, Cambridge (2004)
4. Lecture Notes in Computer Science;K. Socha,2003
5. Lecture Notes in Computer Science;K. Socha,2002