Elmorssy, Mahmoud, and Huseyin Onur Tezcan. “Ordered Generalized Extreme Value Model As a Tool for Demand Modelling of Discretionary Trips”. Promet - Traffic&Transportation 32, no. 2 (March 13, 2020): 193-205. Accessed April 4, 2020. http://traffic.fpz.hr/index.php/PROMTT/article/view/3214.