GRÄTSCH, Matthias. Generalized Schwarzians and normal families. Annales Fennici Mathematici, [S. l.], v. 50, n. 2, p. 611–622, 2025. DOI: 10.54330/afm.176369. Disponível em: https://afm.journal.fi/article/view/176369. Acesso em: 7 dec. 2025.