KHAN, M. Sajjad Ali; RAHMAN, Khaista; ABDULLAH, S.; HUSSAIN, Fawad. ON HYPER BCH-ALGEBRA. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 41, p. 85–96, 2019. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7150. Acesso em: 27 oct. 2026.