Artalejo Rodríguez, Jesús ManuelDudin, Alexander N.Klimenok, Valentina, I.2023-06-202023-06-202001-050167-637710.1016/S0167-6377(01)00059-1https://hdl.handle.net/20.500.14352/57403This work was supported bythe European Commission through INTAS project 96-0828. J.R. Artalejo also thanks the support received from DGES 98-0837.We consider a retrial queueing system where customers at the retrial group have preemptive priority over customers at the waiting line. The stationary distribution can be approximated at a desired level of accuracy in such a way that the approximated marginal distribution of the number of customers at the retrial group remains equal to the exact marginal distribution.engjournal articlehttp://www.sciencedirect.com/science/article/pii/S0167637701000591http://www.sciencedirect.com/restricted access519.8Preemptive priorityRetrial queuesSteady-state distributionInvestigación operativa (Matemáticas)1207 Investigación Operativa