Palyutkіn V. G. Invariant measure on a compact annular group. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 18, n. 4, p. 49–59, 1966. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8312. Acesso em: 18 dec. 2025.