Bratiichuk, M. S., Chechelnitsky , A. A., & Usar, I. Y. (2020). M/M/1 retrial queueing model with variable service rate.
Ukrains’kyi Matematychnyi Zhurnal
,
72
(3), 355-365.
https://doi.org/10.37863/umzh.v72i3.813