MikhailetsV. A., and MurachA. A. “Regular Elliptic Boundary-Value Problem for a Homogeneous Equation in a Two-Sided Improved Scale of Spaces”. Ukrains’kyi Matematychnyi Zhurnal 58, no. 11 (November 25, 2006): 1536–1555. Accessed November 22, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3553.