PETKOV, I. V. The Dirichlet problem for the Beltrami equations in simply connected domains . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 11, p. 12–17, 2025. DOI: 10.15407/dopovidi2015.11.012. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/15364. Acesso em: 10 may. 2026.