Cheng, Jiang, Yinghui Tang, and Miaomiao Yu. “GEOM/GEOM[a]/1//Queue/With/Late/Arrival/System/With/Delayed/Access/and/Delayed/Multiple/Working/Vacations”. Yugoslav Journal of Operations Research 24, no. 1 (February 1, 2014): 127–143. Accessed August 25, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/387.