Anop, A.V., and A.A. Murach. “Homogeneous Elliptic Equations in an Extended Sobolev Scale”. Reports of the National Academy of Sciences of Ukraine, no. 3 (May 9, 2024): 3–11. Accessed December 23, 2024. https://nasu-periodicals.org.ua/index.php/dp/article/view/2566.