7Thalheimer, Erich S. Reduction in city background noise due to relo- cation of artery traffic into underground tunnels [ C ] . The 2004 Na- tional Conference on Noise Control Engineering, 2004:406 -416.
8N. Allen and D. Ocenosak. Analyzing Risk and Cost to Society of Tunnel Alternatives [ C] . NASTr No - Dig Conference, 2008 : F - 1 - 04.
9W. Xueqing, L. Bingsheng, E. Allouche and L. Xiaoyan. A Practi- cal Bid Evaluation Method Considering Social Costs in Urban Infra- structure Projects [ C ] . 4th IEEE International Conference Manage- ment and Innovation of Technology, 2008 : 21 -24, 2008.
10L. Chen and L. Ding. A Study on Social Assessment in Construction Project of China [J] . International Conference on Wireless Commu- nications, Networking and Mobile Computing, 2007 : 21 - 25.