KESTEN, Ali Sercan, and Kemal Selçuk Öğüt. “A NEW PASSENGER ORIENTED PERFORMANCE MEASUREMENT FRAMEWORK FOR PUBLIC RAIL TRANSPORTATION SYSTEMS”. Promet - Traffic&Transportation 26, no. 4 (August 7, 2014): 299-311. Accessed September 23, 2020. http://traffic.fpz.hr/index.php/PROMTT/article/view/1314.