Li, Ye, and Peide Liu. “Some Heronian Mean Operators With 2-Tuple Linguistic Information and Their Application to Multiple Attribute Group Decision Making”. Technological and Economic Development of Economy 21, no. 5 (September 29, 2015): 797-814. Accessed November 26, 2024. https://tede.vgtu.lt/index.php/TEDE/article/view/1135.