G. A. Evdonin, E. N. Popova, and E. I. Tagiltseva, “Modeling of System of Mass Service with Mutual Aid of Channels(on the Example of the Telecommunication Company)”, Administrative Consulting, no. 1, pp. 109–114, Jan. 2013, Accessed: Nov. 08, 2026. [Online]. Available: https://administrative-consulting.owebs.ru/article/view/12312