Units of some abelian imaginary number fields of type (2, 4). Gulf Journal of Mathematics, [S. l.], v. 4, n. 4, 2016. DOI: 10.56947/gjom.v4i4.275. Disponível em: https://gjom.org/index.php/gjom/article/view/275. Acesso em: 23 sep. 2026.