GULLEY, O. D. The optimal structure of lotto games. Economics and Business Letters, [S. l.], v. 7, n. 4, p. 156–161, 2018. DOI: 10.17811/ebl.7.4.2018.156-161. Disponível em: https://reunido.uniovi.es/index.php/EBL/article/view/12914. Acesso em: 22 dec. 2024.