INGELSTAM, L. Symmetry in Real Banach Spaces. MATHEMATICA SCANDINAVICA, [S. l.], v. 18, p. 53–68, 1966. DOI: 10.7146/math.scand.a-10780. Disponível em: https://www.mscand.dk/article/view/10780. Acesso em: 29 apr. 2024.