1. Abate J., Whitt W.: Numerical inversion of laplace transforms of probability distributions ORSA. J. Comput. 7, 36–43 (1995)
2. Ali, O. M. E., Netus, M. E.: A service system with two stages of waiting and feedback customers. J. Appl. Probab. 21, 404–413 (1984)
3. Arivarignan, G., Sivakumar, B.: Inventory system with renewal demands at service facilities. In: Srinivasan, S.K., Vijayakumar, A. (eds.) Stochastic Point Processes, pp 108–123. Narosa Publishing House, New Delhi (2003)
4. Arivarignan, G., Yadavalli, V.S.S., Sivakumar, B.: A perishable inventory system with multi-server service facility and retrial customers. In: Ravichandran, N. (ed.) Management Science and Practice, pp 3–27. Allied Publishers pvt. Ltd., New Delhi (2008)
5. Austin, J. Lemoine: Some Limiting Results for a Queueing Model with Feedback. Sankhya: The Indian Journal of Statistic, series A 36, 293–304 (1974)