V. . Gutlyanskiĭ, O. . Nesmelova, V. . Ryazanov, and A. . Yefimushkin, “Poincaré problem with measurable data for semilinear Poisson equation in the plane”, Dopov. Nac. akad. nauk Ukr., no. 4, pp. 10–18, Aug. 2022.