Mahendra Varma Polakonda, V.N.Rama Deviand , Rajyalakshmi Kottapalli. (2023). (M/EK/C:C/FCFS) Queue with Two-Class Arrivals,State dependent service, Multi-Servers, and Customers Impatience. Journal of Advanced Zoology, 44(S5), 2012–2020. https://doi.org/10.17762/jaz.v44iS-5.1589