MOROZ , M. P. Gauss–Kuzmin problem for the difference Engel-series representation of real numbers. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 7, p. 1004–1008, 2022. DOI: 10.37863/umzh.v74i7.7159. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7159. Acesso em: 5 dec. 2025.