Assanova A, Imanchiyev A. On the unique solvability of a family of multipoint-integral boundary value problems for a third order differential equation. M [Internet]. 2018 Jun. 30 [cited 2025 Aug. 23];90(2):25-33. Available from: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/202