ABDULBASAH KAMIL, Anton. An Asymmetric Information Problem of Environment Quality. MATEMATIKA, [S. l.], v. 22, p. 121–128, 2006. DOI: 10.11113/matematika.v22.n.180. Disponível em: https://matematika.utm.my/index.php/matematika/article/view/180. Acesso em: 6 may. 2024.