KATKOVA, O. M. On the growth of entire generating functions of multiply positive sequences. Математическая физика, анализ, геометрия, Харків, Україна, v. 10, n. 1, p. 61–75, 2003. Disponível em: https://mag.ilt.kharkiv.ua/index.php/mag/article/view/m10-0061e. Acesso em: 23 лис. 2024.