Petrović, Jelica, Ivan Ivković, Ivan Vujačić, and Srećko Žeželj. “Possibilities of Buses on Alternative Fuel in Public Urban Transport in Belgrade”. Technological and Economic Development of Economy 15, no. 1 (March 31, 2009): 78-89. Accessed July 3, 2024. https://btp.vilniustech.lt/index.php/TEDE/article/view/6416.