KJELLBERG, B.; SANDSTRÖM, B. Asymptotic values of an entire function and its derivative. Annales Fennici Mathematici, [S. l.], v. 2, n. 1, p. 257–267, 1976. DOI: 10.5186/aasfm.1976.0217. Disponível em: https://afm.journal.fi/article/view/134296. Acesso em: 25 nov. 2024.