Štrumberger, Nada, Jasna Jurum Kipke, and Gordana Štefančić. “Material Recycling in Transport”. Promet - Traffic&Transportation 11, no. 5 (October 11, 2012): 303–308. Accessed August 26, 2025. https://traffic2.fpz.hr/index.php/PROMTT/article/view/2348.