Grigorieva, Aleksandra. “The Dirichlet Problem for the Higher Order Composite Type Equations With Discontinuous Coefficients”. Mathematical notes of NEFU 28, no. 4 (February 1, 2022): 17-29. Accessed September 13, 2024. https://mzsvfu.ru/index.php/mz/article/view/the-dirichlet-problem-for-the-higher-order-composite-type-equations.