KABADI, Santosh N.; PUNNEN, Abraham P. Trioid: A generalization of matroid and the associated polytope. Algorithmic Operations Research, [S. l.], v. 6, n. 1, p. Pages 29 – 39, 2011. Disponível em: https://journals.lib.unb.ca/index.php/AOR/article/view/18495. Acesso em: 29 mar. 2024.