CONRAD, P. On Ordered Vector Spaces. The Journal of the Indian Mathematical Society, [S. l.], v. 22, n. 1, p. 27–32, 1958. DOI: 10.18311/jims/1958/16960. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/16960. Acesso em: 3 may. 2024.