Koba, E. V., and K. V. Mikhalevich. “RESEARCH OF SERVICE SYSTEMS WITH CYCLIC WAITING TIME”. Problems of Informatization and Control 2, no. 11 (November 17, 2021): 131–134. Accessed June 14, 2026. http://jrnl.kai.edu.ua/index.php/PIU/article/view/16035.