Chepurukhina, I. S., and A. A. Murach. “Elliptic Problems With Unknowns on the Boundary and Irregular Boundary Data”. Methods of Functional Analysis and Topology 26, no. 2 (June 25, 2020): 91–102. Accessed February 4, 2026. https://zen.imath.kiev.ua/index.php/mfat/article/view/749.