On the Erlang Loss Model with Time Dependent Input.

Charles Knessl Yongzhi (Peter) Yang On the Erlang Loss Model with Time Dependent Input. 49-104 2006 52 Queueing Syst. 1 http://dx.doi.org/10.1007/s11134-006-3753-1 db/journals/questa/questa52.html#KnesslY06