1. Zaisheng Wang, Li Jing: China Construction Information, 11 (2011) in Chinese.
2. Jianxin Yuan, Chi Xiao Ming: submitted to Construction Engineering Budget, 9(2011).
3. Weidian Huang, Zaisheng Wang: a Handbook on New Construction Engineering Cost by Shandong Science and Technology Press, (2012)in Chinese.
4. Hongyi Fan, Jieyu Jiang: Modern Physics Letters A. 26(2011), pp.2853-2862.