Lathamaheswari, M. ., Sudha, S. ., Broumi, . S. ., & Smarandache, F. . (2022). Bipolar Neutrosophic Frank Aggregation Operator and its . Neutrosophic Sets and Systems, 51, 420-449. https://fs.unm.edu/nss8/index.php/111/article/view/2575