O'Brien, G. G. (September 1954). "The Solution of Some Queueing Problems". Journal of the Society for Industrial and Applied Mathematics. 2 (3): 133–142. doi:10.1137/0102010. JSTOR2098899.
Morse, P. M. (August 1955). "Stochastic Properties of Waiting Lines". Journal of the Operations Research Society of America. 3 (3): 255–261. doi:10.1287/opre.3.3.255. JSTOR166559.
Hui, J. Y. (1990). "Queueing for Multi-Stage Packet Networks". Switching and Traffic Theory for Integrated Broadband Networks. The Kluwer International Series in Engineering and Computer Science. Vol. 91. pp. 313–341. doi:10.1007/978-1-4615-3264-4_11. ISBN978-1-4613-6436-8.
O'Brien, G. G. (September 1954). "The Solution of Some Queueing Problems". Journal of the Society for Industrial and Applied Mathematics. 2 (3): 133–142. doi:10.1137/0102010. JSTOR2098899.
Morse, P. M. (August 1955). "Stochastic Properties of Waiting Lines". Journal of the Operations Research Society of America. 3 (3): 255–261. doi:10.1287/opre.3.3.255. JSTOR166559.