ZASTAVNYI, V. P. A theorem on zeros of entire functions and its applications. Methods of Functional Analysis and Topology, [S. l.], v. 10, n. 2, p. 91–104, 2004. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/245. Acesso em: 17 dec. 2025.