RIEDEL, Norbert. Classification of dimension groups and iterating systems. MATHEMATICA SCANDINAVICA, [S. l.], v. 48, p. 226–234, 1981. DOI: 10.7146/math.scand.a-11913. Disponível em: https://www.mscand.dk/article/view/11913. Acesso em: 5 dec. 2025.