Kovalenko, I. N. (2000) “Estimation of the Intensity of the Flow of Nonmonotone Refusals in the Queuing System $(≤ λ)/G/m$”, Ukrains’kyi Matematychnyi Zhurnal, 52(9), pp. 1219-1225. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4529 (Accessed: 11May2024).