2Birkmann J. Measuring Vulnerability to Natural Hazards-towards Disaster Resilient Societies [M]. New York: UNU - Press, 2006.
3Fouad AA, Zhou Qin, Vitttal V. System vulnerability as a concept to assess power system dynamic security[J]. IEEE Trans on Power Systems, 1994, 9(2): 1 009- 1 015.
4M Bishop. Vulnerabilities analysis[R]. USA: Computer Science Department of University of California at Davis, 1999.
5Kang Lin, Keith E, Holbert. , PRA for vulnerability assessment of power system infrastructure security[ A]. Power Sym- posium, 2005[ C]. Proceedings of the 37^th Annual North American, 2005 : 43 - 51.
6V. M. Trbojevic. Active Bow Tie Manual[M]. Risk Management Strategies, 2004.