5Mohaymany A S, Gholami A. Multimodal feeder network design problem: Ant colony optimization approach[J]. Journal of Transportation Engineering, 2010, 136(4): 323-331.
6Jiang H, Yu Q, Huang Y. An improved ant colony algorithm for urban transit network optimization[C]// The 6th International Conference on Natural Computation, IEEE Press, 2010:2739-2743.
7Guihaire V, Hao J K. Transit network design and scheduling: A global review[J]. Transportation Research Part A: Policy and Practice, 2008, 42(10): 1251-1273.
