MATKOWSKI, Janusz. Iterations of mean-type mappings and invariant means. Annales Mathematicae Silesianae, [S. l.], v. 13, p. 211–226, 1999. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14150. Acesso em: 3 jul. 2025.