THOMSEN, Klaus. A partial classification result for noncommutative tori. Mathematica Scandinavica, Berkeley, CA, United States, v. 61, p. 134–148, 1987. DOI: 10.7146/math.scand.a-12195. Disponível em: https://journals.msp.org/mscand/article/view/1472. Acesso em: 25 jul. 2026.