Asymptotic analysis of closed queueing networks and its implications to achievable service levels. - David K. George; Cathy H. Xia (SIGMETRICS Perform. Evaluation Rev., 2010)

Fleet-sizing and service availability for a vehicle rental system via closed queueing networks. - David K. George; Cathy H. Xia (Eur. J. Oper. Res., 2011)

Exact-Order Asymptotic Analysis for Closed Queueing Networks. - David K. George; Cathy H. Xia; Mark S. Squillante (J. Appl. Probab., 2012)