MIKULA, Miroslav. Nova PTT usluga - radiopoziv (radio-paging). Promet - Traffic&Transportation, [S. l.], v. 3, n. 1, p. 41–45, 2012. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/1660. Acesso em: 27 aug. 2025.