Stojić, Gordan, Siniša Sremac, and Igor Vasiljković. “A Fuzzy Model for Determining the Justifiability of Investing in a Road Freight Vehicle Fleet”. Operational Research in Engineering Sciences: Theory and Applications 1, no. 1 (December 19, 2018): 62–75. Accessed July 8, 2024. https://oresta.org/menu-script/index.php/oresta/article/view/6.