GUTLYANSKII, V.; RYAZANOV, V.; YAKUBOV, E.; YEFIMUSHKIN, A. On Hilbert boundary value problem for Beltrami equation. Annales Fennici Mathematici, [S. l.], v. 45, n. 2, p. 957–973, 2020. DOI: 10.5186/aasfm.2020.4552. Disponível em: https://afm.journal.fi/article/view/135894. Acesso em: 20 may. 2024.