SEWAGEGN, A. OPTIMIZATION OF TOLL SERVICES USING QUEUING THEORY IN THE CASE OF ETHIOPIA. Perner’s Contacts, [S. l.], v. 17, n. 2, 2022. DOI: 10.46585/pc.2022.2.2400. Disponível em: https://pernerscontacts.upce.cz/index.php/perner/article/view/2400. Acesso em: 21 lis. 2024.