Fedorova E., Voytikov K., “Retrial Queue M/G/1 with Impatient Calls Under Heavy Load Condition.”, Information Technologies and Mathematical Modelling. Queueing Theory and Applications. ITMM 2017. Communications in Computer and Information Science, 800 (2017), 347-357
E. A. Fedorova, A. A. Nazarov, M. P. Farkhadov, “Asymptotic analysis of the MMÐÐ|M|1 retrial queue with negative calls under the heavy load condition”, Izv. Saratov Univ. Math. Mech. Inform., 20:4 (2020), 534–547
E. Yu. Danilyuk, E. A. Fedorova, S. P. Moiseeva, “Asymptotic analysis of an retrial queueing system $\mathrm{M}|\mathrm{M}|1$ with collisions and impatient calls”, Avtomat. i Telemekh., 2018, no. 12, 44–56; Autom. Remote Control, 79:12 (2018), 2136–2146