GUTLYANSKIĬ, V.; RYAZANOV, V.; SEVOST’YANOV, E.; YAKUBOV, E. On the Dirichlet problem for de ge nerate Beltrami equations. Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 3, p. 9–16, 2023. DOI: 10.15407/dopovidi2023.03.009. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/2023-3-2. Acesso em: 2 nov. 2024.