Queueing Theory and Network Applications 14th International Conference, QTNA 2019, Ghent, Belgium, August 27-29, 2019, Proceedings - Phung-Duc, Tuan; Phung-Duc, Tuan; Kasahara, Shoji; Kasahara, Shoji; Wittevrongel, Sabine; Wittevrongel, Sabine (Springer International Publishing : Imprint: Springer, 2019)