Onosevwohwo , P. O., and J. Tsetimi. “AN M/M/R QUEUING MODEL FOR BANK TELLER COUNTER IN ABRAKA, DELTA STATE, NIGERIA”. NIGERIAN JOURNAL OF SCIENCE AND ENVIRONMENT 21, no. 1 (June 7, 2023). Accessed May 20, 2024. https://delsunjse.com/index.php/njse/article/view/109.