Waiting time approximation in single-class queueing systems with multiple types of interruptions: modeling congestion at waterways entrances. - Özgecan S. Ulusçu; Tayfur Altiok (Ann. Oper. Res., 2009)

Waiting time approximation in multi-class queueing systems with multiple types of class-dependent interruptions. - Özgecan S. Ulusçu; Tayfur Altiok (Ann. Oper. Res., 2013)