Gutlyanskiĭ V, Nesmelova O, Ryazanov V. The Dirichlet problem for the Poisson type equations in the plane . Dopov. Nac. akad. nauk Ukr. [Internet]. 2020 May 28 [cited 2026 Jun. 19];(5):10-6. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/2020-5-2