SÈTE, O.; ZUR, J. Number and location of pre-images under harmonic mappings in the plane. Annales Fennici Mathematici, [S. l.], v. 46, n. 1, p. 225–247, 2021. Disponível em: https://afm.journal.fi/article/view/109574. Acesso em: 4 may. 2024.