A Queueing Model of a Production System with Two Machines, One Operator and Priorities. - L. W. Liu; Kouichi Adachi; Masashi Kowada (Queueing Syst. Theory Appl., 1989)

A two-queue model with Bernoulli service schedule and switching times. - Wei Feng; Masashi Kowada; Kouichi Adachi (Queueing Syst. Theory Appl., 1998)

A two-queue and two-server model with a threshold-based control service policy. - Wei Feng; Kouichi Adachi; Masashi Kowada (Eur. J. Oper. Res., 2002)