ZEMYAN, S. M. On the coefficient problem for the Schwarzian derivative. Annales Fennici Mathematici, [S. l.], v. 17, n. 2, p. 221–240, 1992. DOI: 10.5186/aasfm.1992.1734. Disponível em: https://afm.journal.fi/article/view/134754. Acesso em: 25 nov. 2024.