On The Application of Queuing Model in Nigeria Banking Sector: a Case Study of Zenith Bank Plc, Abakaliki Branch. Global Journal of Science Frontier Research, [S. l.], v. 19, n. F2, p. 51–58, 2019. Disponível em: https://www.journalofscience.org/index.php/GJSFR/article/view/2475. Acesso em: 14 aug. 2026.