SCHREYE, D. D. Integrable-ergodic $C^*$-dynamical systems on Abelian groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 57, p. 189–205, 1985. DOI: 10.7146/math.scand.a-12111. Disponível em: https://www.mscand.dk/article/view/12111. Acesso em: 5 may. 2024.