ELETS, L. V.; MASHAROV, P. A. On one extremal problem of Pompeiu sets. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 61, n. 1, p. 61–72, 2009. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3001. Acesso em: 27 apr. 2025.