BOSE, B. Geometry of ℓp-direct sums of normed linear spaces. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 25, p. 31–51, 2025. Disponível em: https://studmath.uken.krakow.pl/article/view/12413. Acesso em: 16 apr. 2026.