CHANG, C. C. The Axiom of Comprehension in Infinite Valued Logic. MATHEMATICA SCANDINAVICA, [S. l.], v. 13, p. 9–30, 1963. DOI: 10.7146/math.scand.a-10685. Disponível em: https://www.mscand.dk/article/view/10685. Acesso em: 14 apr. 2025.