1. Applied Probability and Queues;Asmussen,2003
2. A.A. Borovkov, Stochastic Processes in Queueing Theory, Applications of Mathematics, vol. 4, Springer, New York, 1976.
3. Ergodicity and Stability of Stochastic Processes, Wiley Series in Probability and Statistics;Borovkov,1998
4. The Single Server Queue;Cohen,1982
5. W. Feller, An Introduction to Probability Theory and its Applications, vol. II, second ed., Wiley, New York, 1971.