CHUAQUI, M.; STOWE, D. Valence and oscillation of functions in the unit disk. Annales Fennici Mathematici, [S. l.], v. 33, n. 2, p. 561–584, 2008. Disponível em: https://afm.journal.fi/article/view/135247. Acesso em: 9 may. 2024.