Abelian subgroup of O_4(Q) related to Ryser’s conjecture. Gulf Journal of Mathematics, [S. l.], v. 12, n. 1, p. 56–61, 2022. DOI: 10.56947/gjom.v12i1.776. Disponível em: https://gjom.org/index.php/gjom/article/view/776. Acesso em: 24 aug. 2026.