ONOSEVWOHWO , P. O. .; TSETIMI, . J. . AN M/M/r QUEUING MODEL FOR BANK TELLER COUNTER IN ABRAKA, DELTA STATE, NIGERIA. NIGERIAN JOURNAL OF SCIENCE AND ENVIRONMENT, [S. l.], v. 21, n. 1, 2023. Disponível em: https://delsunjse.com/index.php/njse/article/view/109. Acesso em: 20 may. 2024.