NOWICKI, M. Anselm and Russell. Logic and Logical Philosophy, [S. l.], v. 15, n. 4, p. 355–368, 2007. DOI: 10.12775/LLP.2006.020. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2006.020. Acesso em: 22 jan. 2022.