OLESEN, Dorte; PEDERSEN, Gert Kjaergard. Some $C^*$-dynamical systems with a single KMS state. Mathematica Scandinavica, Berkeley, CA, United States, v. 42, p. 111–118, 1978. DOI: 10.7146/math.scand.a-11740. Disponível em: https://journals.msp.org/mscand/article/view/1904. Acesso em: 25 jul. 2026.