BONET, J.; FRIZ, M. Weakly compact wedge operators on Köthe echelon spaces. Annales Fennici Mathematici, [S. l.], v. 29, n. 1, p. 223–231, 2004. Disponível em: https://afm.journal.fi/article/view/135101. Acesso em: 7 apr. 2025.