Hypergroups Associated with Ternary Relations and the Associated Join Space of the Spherical Geometry. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 9, n. 4, p. 367–382, 2016. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/2515. Acesso em: 22 dec. 2024.