MORLEY, Michael; VAUGHT, Robert. Homogeneous Universal Models. Mathematica Scandinavica, Berkeley, CA, United States, v. 11, p. 37–57, 1962. DOI: 10.7146/math.scand.a-10648. Disponível em: https://journals.msp.org/mscand/article/view/2698. Acesso em: 25 jul. 2026.