1. Scherr, A. L.: An analysis of time-shared computer systems. Cambridge (Mass.): MIT Press 1967
2. Moore, C. G.: Network models for large scale time-sharing systems. University of Michigan, Ph. D. Thesis, 1971
3. Buzen, J.: Queueing network models of multiprogramming. Harvard University, Ph. D. Thesis, 1971
4. Jackson, J. R.: Jobshop-like queueing systems. Management Science 10, 131?142 (1963)
5. Muntz, R.R., Baskett, F.: Open, closed and mixed networks of queues with different classes of customers. Stanford Electronic Laboratories, Technical Report n.33, August 1972