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2. L. Kleinrock, Queueing Systems: Vol. 2 Computer Applications, John Wiley, N.Y., 1976
3. R.W. Wolff; Stochastic Modelling and the Theory of Queues, Prentice-Hall, N.J., 1989
4. F. P. Kelly; Reversibility and Stochastic Networks, Wiley, London, 1979.
5. F. Baccelli and P. Brémaud: Elements of Queueing Theory: Palm-Martingale Calculus and Stochastic Recurrences, 2nd Ed., Applications of Mathematics 26, Springer-Verlag, N. Y., 2005