ŠVADLENKA, L.; SALAVA, D. PRICE REGULATION MODEL FOR POSTAL SERVICES. Perner’s Contacts, [S. l.], v. 8, n. 4, p. 94–99, 2013. Disponível em: https://pernerscontacts.upce.cz/index.php/perner/article/view/773. Acesso em: 30 dub. 2024.