%0 Journal Article %A Bhupender Kumar Som %A Sunny Seth %T M/M/c/N Queuing Systems With Encouraged Arrivals, Reneging, Retention and Feedback Customers %J Yugoslav journal of operations research %D 2018 %P 333 - 344 %V 28 %N 3 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/YJOR_2018_28_3_a2/ %F YJOR_2018_28_3_a2