STEINMETZ, N. A uniqueness theorem for three meromorphic functions. Annales Fennici Mathematici, [S. l.], v. 13, n. 1, p. 93–110, 1988. DOI: 10.5186/aasfm.1988.1307. Disponível em: https://afm.journal.fi/article/view/134615. Acesso em: 25 nov. 2024.