Concavity of the conditional mean sojourn time in the M/G/1 processor-sharing queue with batch arrivals.

Jeongsim Kim Bara Kim Concavity of the conditional mean sojourn time in the M/G/1 processor-sharing queue with batch arrivals. 57-64 2008 58 Queueing Syst. 1 http://dx.doi.org/10.1007/s11134-007-9058-1 db/journals/questa/questa58.html#KimK08