Khan IE, Paramasivam R. Markovian Erlang Non-Constricted Single-Channel with Encouraged Arrival in Steady State with Balking, Feedback Strategy, and Customer Retention. Contemp. Math. [Internet]. 2023 Oct. 25 [cited 2024 Dec. 27];4(4):769-81. Available from: https://ojs.wiserpub.com/index.php/CM/article/view/2964