KREINOVICH, V.; CEBERIO, M.; BREFORT, Q. In Category of Sets and Relations, It Is Possible to Describe Functions in Purely Category Terms. Eurasian Mathematical Journal, [S. l.], v. 6, n. 2, p. 90–94, 2015. Disponível em: https://emj.enu.kz/index.php/main/article/view/611. Acesso em: 31 oct. 2025.