KAWASAKI, T.; TOYODA, M.; WATANABE, T. THE HAHN-BANACH THEOREM AND THE SEPARATION THEOREM IN A PARTIALLY ORDERED VECTOR SPACE. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO), [S. l.], v. 2, n. 1, p. 111–117, 2011. Disponível em: https://ph03.tci-thaijo.org/index.php/jnao/article/view/2620. Acesso em: 2 sep. 2026.