Khan, M. ., S. Anis, S. . Iqbal, and S.-Z. . Song. “Norms and Delta-Equalities of Complex Neutrosophic Sets”. Neutrosophic Sets and Systems, vol. 48, Feb. 2022, pp. 457-82, http://fs.unm.edu/NSS2/index.php/111/article/view/2116.