KOVTONYUK, D. A.; PETKOV, I. V.; RYAZANOV, V. I. On the Dirichlet problem for the Beltrami equations in finitely connected domains. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 64, n. 7, p. 932–944, 2012. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2629. Acesso em: 11 apr. 2025.