1. R. Syski, Introduction to Congestion Theory in Telephone-Systems, Reprint, Oliver and Boyd, Edinburg, 1985.
2. International Teletraffic Congress, since 1955 (conference and proceedings every three years).
3. F.S. Hillier, G.J. Liebermann, Introduction to Operations Research, Holden Day, San Francisco, CA, 1967.
4. G. Haring, C. Lindemann, M. Reiser, Performance evaluation: origin and directions, in: LNCS State-of-the-Art Survey, Vol. 1769, Springer, Berlin, 2000.
5. C.A.R. Hoare, Communicating Sequential Processes, Prentice-Hall, Englewood Cliffs, NJ, 1985.