FERDINAND, Friska Natalia. Comparison of Monopoly and Sharing Line-haul Vehicles in Express Delivery Service. Ultima InfoSys : Jurnal Ilmu Sistem Informasi, [S. l.], v. 6, n. 1, p. 58–63, 2015. DOI: 10.31937/si.v6i1.280. Disponível em: https://ejournals.umn.ac.id/index.php/SI/article/view/280. Acesso em: 17 may. 2025.