Gutlyanskiĭ, V.Ya., O.V. Nesmelova, V.I. Ryazanov, and A.S. Yefimushkin. “Hilbert Problem With Measurable Data for Semilinear Equations of the Vekua Type”. Reports of the National Academy of Sciences of Ukraine, no. 2 (May 10, 2022): 3–11. Accessed July 3, 2022. https://dopovidi-nanu.org.ua/ojs/index.php/dp/article/view/2022-2-1.