Radmilović, Zoran, Vladislav Maraš, and Saša Jovanović. “Ship Lock As General Queuing System With Batch Arrivals and Batch Service”. Promet - Traffic&Transportation 19, no. 6 (1): 343-352. Accessed July 11, 2020. http://traffic.fpz.hr/index.php/PROMTT/article/view/969.