SIERPINSKI, W. Sur Quelques Problemes Concernant Les Suites Infinies D’Ensembles Infinis De Nombres Naturels. The Journal of the Indian Mathematical Society, [S. l.], v. 24, n. 3-4, p. 551–555, 1960. DOI: 10.18311/jims/1960/16931. Disponível em: http://www.informaticsjournals.com/index.php/jims/article/view/16931. Acesso em: 14 may. 2024.