JOARDER, A. H.; ISLAM, S. M. S. Cardinality of Joint and Disjoint Sets and a Related Discrete Distribution. Engineering International, [S. l.], v. 10, n. 2, p. 55–68, 2022. DOI: 10.18034/ei.v10i2.681. Disponível em: https://abc.us.org/ojs/index.php/ei/article/view/681. Acesso em: 16 may. 2024.