Sin-Man Choi, Ximin Huang, Wai-Ki Ching and Min Huang. (2018). Incentive Effects of Multiple-Server Queueing Networks: The Principal-Agent Perspective.
            <i>East Asian Journal on Applied Mathematics</i>. <i>1</i> (4).
            379-402.
         doi:10.4208/eajam.231010.260711a