Florentin Smarandache (2023) “Ambiguous Set is a subclass of the Double Refined Indeterminacy Neutrosophic Set, and of the Refined Neutrosophic Set in general”, Neutrosophic Sets and Systems, 58, pp. 639–643. Available at: https://fs.unm.edu/nss8/index.php/111/article/view/3568 (Accessed: 16 July 2024).