1. Fundamental of Queueing Theory;Gross,1969
2. W. Feller, An Introduction to Probability Theory and Its Applications, vol. 1, Wiley, New York, 1967
3. Elements of Queueing Theory with Applications;Saaty,1961
4. Queue-dependent servers;Singh;J. Eng. Math.,1973
5. Queue-dependent servers queueing system;Garg;Microelectronics and Reliability,1993