ISBELL, J. R. Factorization of Banach Spaces. Mathematica Scandinavica, Berkeley, CA, United States, v. 13, p. 105–108, 1963. DOI: 10.7146/math.scand.a-10693. Disponível em: https://journals.msp.org/mscand/article/view/2625. Acesso em: 25 jul. 2026.