Tuljak-Suban, Danijela. “MCDM Bunkering Optimisation in a Hub and Spoke System: The Case of the North Adriatic Ports”. Promet - Traffic & Transportation 31, no. 5 (October 28, 2019): 539-547. Accessed November 18, 2019. http://traffic.fpz.hr/index.php/PROMTT/article/view/3114.