KIM, S. G. The norming set of a symmetric 3-linear form on the plane with the $l_1$-norm. New Zealand Journal of Mathematics, [S. l.], v. 51, p. 95–108, 2021. DOI: 10.53733/177. Disponível em: https://www.nzjmath.org/index.php/NZJMATH/article/view/177. Acesso em: 5 may. 2024.