1. Benson, F.; Cox, D.R.: The productivity of machines requiring attention at random intervals. Journal of Royal Statistical Society, 13B (1951), S. 65–82.
2. Brigham, G.: On a congestion problem in an aircraft factory. Operations Research 3 (1955), S. 412–428.
3. Brockmeier, E.; Halmstrøm, H.L.; Jensen, A.: The life and work of A.K. Erlang. Kopenhagen: Copenhagen Telephone Comp. (1948)
4. Cohen, J.W.: The single server queue. Amsterdam: North Holland (1969).
5. Cooper, R.B.: Introduction to queueing theory. London: E. Arnold. 2. Aufl. (1981).