MEL'NIK, Yu. I. On divergence of series of exponents representing functions regular in convex polygons. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 4, p. 443–445, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5744. Acesso em: 15 dec. 2025.