BuryachenkoK. O. “Solvability of Inhomogeneous Boundary-Value Problems for Fourth-Order Differential Equations”. Ukrains’kyi Matematychnyi Zhurnal 63, no. 8 (August 25, 2011): 1011-1020. Accessed December 14, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2781.