OLIVKOVÁ, I. QUALITY STANDARDS FOR MEASURING THE LEVEL OF SERVICE IN PUBLIC TRANSPORT. Perner’s Contacts, [S. l.], v. 6, n. 4, p. 229–235, 2011. Disponível em: https://pernerscontacts.upce.cz/index.php/perner/article/view/922. Acesso em: 25 lis. 2024.