LEHTINEN, M. Angles and the inner radius of univalency. Annales Fennici Mathematici, [S. l.], v. 11, n. 2, p. 161–165, 1986. DOI: 10.5186/aasfm.1986.1110. Disponível em: https://afm.journal.fi/article/view/134568. Acesso em: 25 nov. 2024.