CATALAN, F. X.; TWEDDLE, I. Some Dense Barrelled Subspaces of $\omega$ and Incomplete $\phi$-Spaces. MATHEMATICA SCANDINAVICA, [S. l.], v. 75, p. 185–194, 1994. DOI: 10.7146/math.scand.a-12514. Disponível em: https://www.mscand.dk/article/view/12514. Acesso em: 8 may. 2024.