IBRAHIM, M.; MUSA, A. A Study of Some New Statistics on the - non-Deranged Permutations. International Journal of Science for Global Sustainability, [S. l.], v. 9, n. 1, p. 6, 2023. DOI: 10.57233/ijsgs.v9i1.406. Disponível em: https://www.fugus-ijsgs.com.ng/index.php/ijsgs/article/view/406. Acesso em: 24 jun. 2026.