Ran, Ling-Gang, and Gui-Wu Wei. “Uncertain Prioritized Operators and Their Application to Multiple Attribute Group Decision Making”. Technological and Economic Development of Economy 21, no. 1 (January 29, 2015): 118-139. Accessed October 19, 2021. https://journals.vgtu.lt/index.php/TEDE/article/view/1046.