ALZUGARAY, M. T. On growth and domains of holomorphy of functions that are analytic in a disk and generate Pólya frequency sequences. Математическая физика, анализ, геометрия, Харків, Україна, v. 9, n. 2, p. 281–284, 2002. Disponível em: https://mag.ilt.kharkiv.ua/index.php/mag/article/view/m09-0281e. Acesso em: 22 лис. 2024.