SILVA, Marcos. Could Wittgenstein still be held as a father of truth tables?. O que nos faz pensar, [S.l.], v. 25, n. 39, p. 123-146, jan. 1970. ISSN 0104-6675. Disponível em: <http://www.oquenosfazpensar.fil.puc-rio.br/index.php/oqnfp/article/view/516>. Acesso em: 18 dec. 2017.