GODEFROY, Giles; LI, Daniel. Some natural families of M-ideals. Mathematica Scandinavica, Berkeley, CA, United States, v. 66, p. 249–263, 1990. DOI: 10.7146/math.scand.a-12309. Disponível em: https://journals.msp.org/mscand/article/view/1310. Acesso em: 24 jul. 2026.