1. M. Abromowitz and I.A. Stegun, Handbook of Mathematical Functions (Dover Publications, New York).
2. A difference equation technique applied to the simple queue;Conolly;J. Roy. Statist. Soc. Ser. B,1958
3. Fundamentals of Queueing Theory;Gross,1974
4. Queues, Inventories and Maintenance;Morse,1958
5. Elements of Queuing Theory with Applications;Saaty,1961