RIEDEL, Norbert. Classification of dimension groups and iterating systems. Mathematica Scandinavica, Berkeley, CA, United States, v. 48, p. 226–234, 1981. DOI: 10.7146/math.scand.a-11913. Disponível em: https://journals.msp.org/mscand/article/view/1715. Acesso em: 25 jul. 2026.