1. E. Bonabeau, M. Dorigo, and G. Theraulaz. Swarm Intelligence: From Natural to Artificial Systems. Santa Fe Institute Studies in the Sciences of Complexity. Oxford University Press, 1999.
2. J. L. Bresina. Heuristic-biased stochastic sampling. In Proceedings of the Thirteenth National Conference on Artificial Intelligence and the Eighth Innovative Applications of Artificial Intelligence Conference, Volume One, pages 271–278. AAAI Press, 1996.
3. A. Cesta, A. Oddi, and S. F. Smith. An iterative sampling procedure for resource constrained project scheduling with time windows. In Proceedings of the Sixteenth International Joint Conference on Artificial Intelligence, pages 1022–1029. Morgan Kaufmann, 1999.
4. T. H. Cormen, C. E. Leiserson, and R. L. Rivest. Introduction to Algorithms. McGraw-Hill, 1990.
5. M. Dorigo and G. Di Caro. The ant colony optimization meta-heuristic. In D. Corne, M. Dorigo, and F. Glover, editors, New Ideas in Optimization. McGraw-Hill, 1999.