GJERDE, Richard; JOHANSEN, Ørjan. $C^*$-algebras associated to non-homogeneous minimal systems and their K-theory. Mathematica Scandinavica, Berkeley, CA, United States, v. 85, n. 1, p. 87–104, 1999. DOI: 10.7146/math.scand.a-13887. Disponível em: https://journals.msp.org/mscand/article/view/941. Acesso em: 24 jul. 2026.