1. Dudin, A., Nazarov, A.: On a tandem queue with retrials and losses and state dependent arrival, service and retrial rates. Int. J. Oper. Res. 29, 170–182 (2017)
2. Artalejo, J., Gomez-Corral, A.: Retrial Queueing Systems. A Computational Approach. Springer, Heidelberg (2008). https://doi.org/10.1007/978-3-540-78725-9
3. Nazarov, A., Moiseeva, E.: Investigation of the RQ-system $$MMPP|M|1$$ by the method of asymptotic analysis in the condition of a large load. Izv. Tomsk. Polytech. Univ. 322, 19–23 (2013). (in Russian)
4. Borovkov, A.: Asymptotic Methods in Queueing Theory. Wiley, New York (1984)
5. Tsitsiashvili, G., Osipova, M.: Synergetic effects for number of busy servers in multiserver queuing systems. Commun. Comput. Inf. Sci. Ser. 564, 404–414 (2015)