GUTLYANSKII, V.; RYAZANOV, V. I.; ЯКУБОВ, Е. Toward the theory of the Dirichlet problem for the Beltrami equations . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 11, p. 23–29, 2025. DOI: 10.15407/dopovidi2015.11.023. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/15366. Acesso em: 10 may. 2026.