1. Thirteen-Five Development Instruction in City Transportation of China. National Development and Reform Commission.
http://www.ndrc.gov.cn/fzgggz/fzgh/ghwb/gjjgh/201707/W020170720477719367685.pdf
2. Wei, H.M.: A study on the Development Strategy Optimization of Guangzhou Subway Co., Ltd. Lanzhou: Lanzhou University (2014)
3. Li, H.Q.: The Potential Safety Hazard of Urban Rail Transit Checking and Controlling Method Research and Practice–Case Study of Guangzhou Metro. South China University of Technology, Guangzhou (2016)
4. Li, H.X.: Factor spaces and mathematical frame of knowledge representation(VII)—mulitifactorial decision making with multiple objectives. Fuzzy Syst. Math. 9(12), 15–24 (1995)
5. Li, H.X.: Factor spaces and mathematical frame of knowledge representation(VI)—generation of ASMm-func and general models of mulitifactorial decision making. J. Syst. Eng. 14(1), 1–8 (1999)