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2. Li M., Wu F.. (2008) Railway signal reliability safety theory and confirmation. Chinese Railway Publishing House, Beijing.
3. Institution B. S. (1999) EN50126. Railway Applications – The Rpecification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS). CENELEC, Brussels.
4. Institution B. S. (2001) EN50128. Railway Applications- Software for Railway Control and Protection Systems. CENELEC, Brussels.
5. Ministry of Railways of China. (2019) Technical Specifications for Computer Based Interlocking. China Railway Publishing House, Beijing.