TOPPILA, S. On Nevanlinna’s characteristic function of entire functions and their derivatives. Annales Fennici Mathematici, [S. l.], v. 2, n. 1, p. 131–134, 1976. DOI: 10.5186/aasfm.1977.0326. Disponível em: https://afm.journal.fi/article/view/134283. Acesso em: 25 nov. 2024.