8Colorni A, Dorigo M, Maniezzo V, et al. Distributed optimization by ant colonies[A]. Proceedings of the 1st European Conference on Artificial Life,1991: 134-142.
9Dorigo M. Optimization, Learning and Natural Algorithms[D]. Department of Electronics, Politecnico dimilano, 1992, Italy.
10Saaty T L. Theanalytic hierarchy process,priority setting, resource allocation[J]. New York: Mc Graw, 1980: 287-305.
