Rezaeezadeh, G.R., and M.R. Darafsheh. “OD-CHARACTERIZABILITY OF THE SYMMETRIC GROUP \(\mathbb{S}_{27}\)”. Italian Journal of Pure and Applied Mathematics 37 (January 31, 2017): 467–472. Accessed September 16, 2026. https://journals.uniurb.it/index.php/ijpam/article/view/6686.