Tilahun, Surafel Luleseged, and Hong Choon Ong. “Bus Timetabling As a Fuzzy Multiobjective Optimization Problem Using Preference-Based Genetic Algorithm”. Promet - Traffic&Transportation 24, no. 3 (1): 183-191. Accessed March 29, 2024. http://traffic.fpz.hr/index.php/PROMTT/article/view/311.