VLASÁKOVÁ, M. Logic and Sets. Logic and Logical Philosophy, [S. l.], v. 29, n. 1, p. 71–95, 2019. DOI: 10.12775/LLP.2019.023. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2019.023. Acesso em: 22 oct. 2021.