SKASKIV, O. B.; Trusevich О. M. Relations of Borel Type for Generalizations of Exponential Series. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 53, n. 11, p. 1580–1584, 2001. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4379. Acesso em: 6 dec. 2025.