1. Lai LC (1993) Queuing theory. Beijing Inst Posts Telecommun Press 15:143–148
2. Zhiheng S, Jianping L (2005) Fundamentals of queueing theory. Sci Press 8:35–113
3. Zhixue W (2008) Management operational research in Beijing the publishing house of electronics industry 3(4):89–94
4. Xierui L, ChengZhang X, Lianfen L, Xieqiang M (2009) The thought of mathematical modeling and the university mathematics teaching integration. Chin Adult Educ 17:129–130
5. Arik S (2003) An analysis of exponential stability of delayed neural networks with time varying delays. Neural Netw 17:1027–1031