LAINE, I. A remark on finely harmonic mappings. Annales Fennici Mathematici, [S. l.], v. 2, n. 1, p. 135–140, 1976. DOI: 10.5186/aasfm.1977.0311. Disponível em: https://afm.journal.fi/article/view/134285. Acesso em: 14 apr. 2025.