TOPPILA, S. On the growth of the spherical derivative of a meromorphic function. Annales Fennici Mathematici, [S. l.], v. 7, n. 2, p. 119–139, 1982. DOI: 10.5186/aasfm.1982.0731. Disponível em: https://afm.journal.fi/article/view/134435. Acesso em: 25 nov. 2024.