PESTOV, V. G. Balancing sign of the locally compact group . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 40, n. 1, p. 127–129, 1987. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9071. Acesso em: 5 dec. 2025.