FENG, Yuming; ONASANYA, B.O. MULTIGROUPS AND MULTICOSETS. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 41, p. 251–261, 2019. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7131. Acesso em: 27 oct. 2026.