BRIEM, Eggert. Enlarging a subspace of $C(X)$ without changing the Choquet boundary. Mathematica Scandinavica, Berkeley, CA, United States, v. 44, p. 218–224, 1979. DOI: 10.7146/math.scand.a-11805. Disponível em: https://journals.msp.org/mscand/article/view/1843. Acesso em: 25 jul. 2026.