CHEN, J.; KALAJ, D. A Schwarz lemma for hyperbolic harmonic mappings in the unit ball. MATHEMATICA SCANDINAVICA, [S. l.], v. 127, n. 3, 2021. DOI: 10.7146/math.scand.a-128528. Disponível em: https://www.mscand.dk/article/view/128528. Acesso em: 22 jan. 2022.