Optimal policies of M(t)/M/c/c queues with two different levels of servers. - Ali Tirdad; Winfried K. Grassmann; Javad Tavakoli (Eur. J. Oper. Res., 2016)

A stochastic model for the patient-bed assignment problem with random arrivals and departures. - Mojtaba Heydar; Malgorzata M. O'Reilly; Erin Trainer; Mark Fackrell; Peter G. Taylor; Ali Tirdad (Ann. Oper. Res., 2022)