Herrera-Viedma, Enrique. “Fuzzy Sets and Fuzzy Logic in Multi-Criteria Decision Making. The 50th Anniversary of Prof. Lotfi Zadeh’s Theory: Introduction”. Technological and Economic Development of Economy 21, no. 5 (September 29, 2015): 677-683. Accessed April 19, 2024. https://journals.vilniustech.lt/index.php/TEDE/article/view/1125.