Gutlyanskii V, Ryazanov VI, Якубов Е. Toward the theory of the Dirichlet problem for the Beltrami equations . Dopov. Nac. akad. nauk Ukr. [Internet]. 2025 Feb. 8 [cited 2026 May 10];(11):23-9. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/15366