Correlation Coefficient of Interval-Valued Fuzzy Sets with Interval-Valued Reference Functions and Applications in Medical Diagnosis and Selecting Appropriate Mediciness. Contemp. Math. [Internet]. 2025 Apr. 21 [cited 2025 Dec. 24];6(2):2450-65. Available from: https://ojs353.mebyme.cn/index.php/CM/article/view/6108