SZCZEPANIK, Mariusz. The weak fixed point property of direct sums of some Banach spaces. Topological Methods in Nonlinear Analysis, [S. l.], v. 54, n. 2, p. 641–648, 2019. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2019.057. Acesso em: 8 jul. 2025.