2M Dorigo,V Maniezzo,A Colomi.The Ant System:Optimization by a Colony of Cooperating Agents[J].IEEE Trans-actions on Systems,Man,and Cyber net B,1996,26(1):29 -41.
3Dorigo. Ant colony system: A cooperative learning approach to the traveling salesman problem[J].IEEE Transactions on Evolutionary Computation,1997,1(1): 53-66.