ZAVADA, Josip; BLAŠKOVIĆ ZAVADA, Jasna; MILOŠ, Katica. Conditions for Implementing Trolleybuses in Public Urban Transport. Promet - Traffic&Transportation, [S. l.], v. 22, n. 6, p. 467–474, 2012. DOI: 10.7307/ptt.v22i6.212. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/1484. Acesso em: 26 aug. 2025.