2MIL-STD-882D, Department of Defense Standard Practice for System Safety, 2000.
3Yaghmour K. Building Embeded Linux System [ M ]. New- York : O'Reilly & Associates, 2003.
4Yu Yangyang, Johnson B W. The Quantitative Safety As- sessment for Safety-Critical Software [ C ]. Proceedings of the 29th Annum IEEE/NASA on Software Engineering Workshop, Maryland, USA, 2005 : 150-162.