[1]

J.R. Artalejo, A queueing system with returning customers and waiting line, Operations Research Letters 17 (1995) 191-199.

[2]

J.R. Artalejo, Stationary analysis of the characteristics of the *M/M/*2 queue with constant repeated attempts, Opsearch 33 (1996) 83-95.

[3]

J.R. Artalejo, Accessible bibliography on retrial queues, Mathematical and Computer Modelling 30 (1999) 1-6.

[4]

J.R. Artalejo, A classified bibliography of research on retrial queues: Progress in 1990-1999, Top 7 (1999) 187-211.

[5]

J.R. Artalejo, A. Gomez-Corral and M.F. Neuts, Numerical analysis of multiserver retrial queues operating under a full access policy, in: *Advances in Algorithmic Methods for Stochastic Models*, eds. G. Latouche and P.G. Taylor (Notable Publications, Inc., 2000).

[6]

B.D. Choi, Y.C. Kim and Y.W. Lee, The *M/M/c* retrial queue with geometric loss and feedback, Computers and Mathematics with Applications 36 (1998) 41-52.

[7]

J.W. Cohen, Basic problems of telephone traffic theory and the influence of repeated calls, Phillips Telecommunication Review 18 (1957) 49-100.

[8]

G.I. Falin, Calculation of probability characteristics of a multiline system with repeat calls, Moscow University Computational Mathematics and Cybernetics 1 (1983) 43-49.

[9]

G.I. Falin and J.R. Artalejo, Approximations for multiserver queues with balking/retrial discipline, OR Spektrum 17 (1995) 239-244.

[10]

G.I. Falin and J.G.C. Templeton, *Retrial Queues* (Chapman and Hall, London, 1997).

[11]

A. Gomez-Corral and M.F. Ramalhoto, The stationary distribution of a Markovian process arising in the theory of multiserver retrial queueing systems, Mathematical and Computer Modelling 30 (1999) 141-158.

[12]

T. Hanschke, A matrix continued fraction algorithm for the multi-server repeated order queue, Mathematical and Computer Modelling 30 (1999) 159-170.

[13]

Z. Khalil, G.I. Falin and T. Yang, Some analytical results for congestion in subscriber line modules, Queueing Systems 10 (1992) 381-402.

[14]

Y.C. Kim, On *M/M/*3*/*3 retrial queueing system, Honam Mathematical Journal 17 (1995) 141-147.

[15]

C. Langaris, Markovian polling systems with mixed service disciplines and retrial customers, Top 7 (1999) 305-322.

[16]

M.F. Neuts and B.M. Rao, Numerical investigation of a multiserver retrial model, Queueing Systems 7 (1990) 169-190.

[17]

C.E.M. Pearce, Extended continued fractions, recurrence relations and two-dimensional Markov processes, Advances in Applied Probability 21 (1989) 357-375.

[18]

M.F. Ramalhoto and A. Gomez-Corral, Some decomposition formulae for *M/M/r/r*+*d* queues with constant retrial rate, Stochastic Models 14 (1998) 123-145.

[19]

S.N. Stepanov, Markov models with retrials: the calculation of stationary performance measures based on the concept of truncation, Mathematical and Computer Modelling 30 (1999) 207-228.

[20]

R.I. Wilkinson, Theories for toll traffic engineering in the U.S.A., The Bell System Technical Journal 35 (1956) 421-514.