1. M. Dorigo, Optimization, Learning and Natural Algorithms. Ph.D Thesis, Politecnico di Milano, Italy, (1992).
2. The Ant System: optimization by a colony of cooperating agents;Dorigo;IEEE Transactions on Systems, Man and Cybernetics. Part B,1996
3. Ant Colony Optimization;Maniezzo,2004
4. Ant Colony Optimization — new optimization techniques in engineering;Dorigo,1991
5. Ant algorithms for discrete optimization;Dorigo;Artificial Life,1999