1. Introduction to the Theory of Queues;Takács,1962
2. Markovian Queues;Sharma,1986
3. Explicit probability density function for the length of a busy period in an M/M/1/K queue;Takagi,2009
4. The Single Server Queue;Cohen,1982
5. Busy periods in time-dependent M/G/1 queue;Rosenlund;Adv. Appl. Prob.,1976