References

[Page 599 ( continued )]

Buffa, E. S. Operations Management: Problems and Models , 3rd ed. New York: John Wiley & Sons, 1972.

Feller, W. An Introduction to Probability Theory and Its Applications . Vol. 1, 3rd ed. New York: John Wiley & Sons, 1968.

Hillier, F., and Lieberman, G. J. Introduction to Operations Research , 4th ed. San Francisco: Holden-Day, 1986.

Morse, P. M. Queues, Inventories, and Maintenance . New York: John Wiley & Sons, 1958.

Saaty, T. L. Elements of Queuing Theory . New York: McGraw-Hill, 1961.