Yezhov, I. I., and V. F. Kadankov. “System $G|G^κ|1$ With Batch Service of Calls”. Ukrains’kyi Matematychnyi Zhurnal 54, no. 4 (April 25, 2002): 447-465. Accessed May 30, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4083.