Tetsuya Takine Yutaka Matsumoto Tatsuya Suda Toshiharu Hasegawa Mean Waiting Times in Nonpreemptive Priority Queues with Markovian Arrival and i.i.d. Service Processes. 131-149 1994 20 Perform. Eval. 1-3 db/journals/pe/pe20.html#TakineMSH94