BARANOVSKYI, O. M.; PRATSIOVYTYI, M. V.; TORBIN, H. M. Topological and metric properties of sets of real numbers with conditions on their expansions in Ostrogradskii series. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 9, p. 1155–1168, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3379. Acesso em: 5 dec. 2025.