Zavada, Josip, Jasna Blašković Zavada, and Katica Miloš. “Conditions for Implementing Trolleybuses in Public Urban Transport”. Promet - Traffic&Transportation 22, no. 6 (March 2, 2012): 467-474. Accessed March 28, 2024. https://traffic.fpz.hr/index.php/PROMTT/article/view/212.