ISBELL, J. R. Factorization of Banach Spaces. MATHEMATICA SCANDINAVICA, [S. l.], v. 13, p. 105–108, 1963. DOI: 10.7146/math.scand.a-10693. Disponível em: https://tidsskrift.dk/math/article/view/10693. Acesso em: 14 aug. 2026.