8Zhao Dongmei, Wang Jinghong, Ma jianfeng. Fuzzy risk assessment of the network security[J]. Mahine Learning and Cybernetics, 2006:13-16.
9Mohammad A Mustafa, Jamal F AI-Bahar. Project riskassessment using the analytic hierarchy process [J]. .IEEE Transactions on Engineering Management. 1991,38(1) : 46- 52.