Gjumbir, Marijana, and Tomislav Šikić. “Kriterij Za Izbor Odabranih Dvoparametarskih Modela”. Promet - Traffic&Transportation 3, no. 5 (1): 219-226. Accessed October 22, 2021. https://traffic.fpz.hr/index.php/PROMTT/article/view/464.