ŁUKASIK, Radosław. Invariant means on Banach spaces. Annales Mathematicae Silesianae, [S. l.], v. 31, p. 127–140, 2016. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/13944. Acesso em: 2 jul. 2025.