HEYER, H. The Liouville property for harmonic functions on groups and hypergroups. Methods of Functional Analysis and Topology, [S. l.], v. 23, n. 1, p. 3–25, 2017. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/650. Acesso em: 16 dec. 2025.