VERIFICATION OF THE TARIFF RATE STRUCTURE OF A PARCEL SHIPPING SERVICE. Perner’s Contacts, [S. l.], v. 6, n. 1, p. 328–341, 2011. Disponível em: https://ojs-demo.upce.cz/index.php/perner/article/view/810. Acesso em: 2 mar. 2026.