NIELSEN, N. J.; OLSEN, G. H. Complex preduals of $L_1$ and subspaces of $l^n_\infty(\mathsf(C))$. Mathematica Scandinavica, Berkeley, CA, United States, v. 40, p. 271–287, 1977. DOI: 10.7146/math.scand.a-11694. Disponível em: https://journals.msp.org/mscand/article/view/1953. Acesso em: 25 jul. 2026.