Gutlyanskiĭ V, Ryazanov V, Sevost’yanov E, Yakubov E. On the Dirichlet problem for de ge nerate Beltrami equations. Dopov. Nac. akad. nauk Ukr. [Internet]. 2023 Jul. 11 [cited 2024 Nov. 2];(3):9-16. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/2023-3-2