TY - JOUR A1 - Brandt, Andreas A1 - Brandt, Manfred T1 - On the two-class $M/M/1$ system under preemptive resume and impatience of the prioritized customers T2 - Queueing Syst. Y1 - 2004 UR - https://opus4.kobv.de/opus4-zib/frontdoor/index/index/docId/2900 VL - 47 SP - 147 EP - 168 ER -