Herrera-Viedma E. Fuzzy sets and fuzzy logic in multi-criteria decision making. The 50th anniversary of Prof. Lotfi Zadeh’s theory: introduction. TEDE [Internet]. 2015Sep.29 [cited 2024Apr.18];21(5):677-83. Available from: https://journals.vilniustech.lt/index.php/TEDE/article/view/1125