SCHANG, F. Abstract logic of oppositions. Logic and Logical Philosophy, [S. l.], v. 21, n. 4, p. 415–438, 2012. DOI: 10.12775/LLP.2012.019. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2012.019. Acesso em: 4 lip. 2024.