Waiting-Time Asymptotics for the M/G/2 Queue with Heterogeneous Servers.

Onno J. Boxma Q. Deng A. P. Zwart Waiting-Time Asymptotics for the M/G/2 Queue with Heterogeneous Servers. 5-31 2002 40 Queueing Syst. 1 db/journals/questa/questa40.html#BoxmaDZ02