Artalejo Rodríguez, Jesús Manuel2023-06-202023-06-201993-03T. Yang and J. G. C. Templeton (1987) A survey on retrial queues.Queueing Syst.2,201-233. G. I. Falin (1990) A survey of retrial queues. Queueing Syst. 7, 127-168. A.G.de Kok(1984)Algorithmic methods for single server systems with repeated attempts.Statistica Neerlandica 38,23-32. J. Keilson, J. Cozzolino and H. Young (1968) A. service system with unfilled request repeated. Opns Res. 16,1126-1137. Q.H.Choo and B. W. Conolly (1979) New results in the theory of repeated orders queueing systems.J.Appl. Probab.16,631-640.0160-568210.1038/sj/jors/0440311https://hdl.handle.net/20.500.14352/57513In this paper we study the M/H2/1 queue with returning customers. We obtain explicit formulae for the steady-state distribution and the expected quality characteristics of the system. In addition, a simple recursion scheme for computing the 'orbit' busy period is proposed.engjournal articlehttp://www.jstor.org/stable/2584201http://www.jstor.org/restricted access519.8Convolutive equationsHyperexponential distributionMarkov processesRetrial queuesSteady-state distributionInvestigación operativa (Matemáticas)1207 Investigación Operativa