VAN MILL, Jan. An easy proof that β????-????-{p} is not normal. Annales Mathematicae Silesianae, [S. l.], v. 2, p. 81–84, 1986. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14326. Acesso em: 8 may. 2025.