Apakov Y, Umarov R. Solution of a boundary value problem for a third-order inhomogeneous equation with multiple characteristics with the construction of the Green’s function. M [Internet]. 2024 Jun. 28 [cited 2025 Aug. 26];114(2):22-39. Available from: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/645