PELIGRAD, Costel. Compact group actions on operator algebras and their spectra. Mathematica Scandinavica, Berkeley, CA, United States, v. 126, n. 2, p. 276–292, 2020. DOI: 10.7146/math.scand.a-119079. Disponível em: https://journals.msp.org/mscand/article/view/195. Acesso em: 24 jul. 2026.