Turmetov, B Kh, and A E Bekayeva. “About Operator Method of Solution of Some Boundary Value Problems for Inhomogeneous Biharmonic Equation”. Journal of Mathematics, Mechanics and Computer Science 71, no. 4 (December 28, 2011): 62–71. Accessed December 22, 2024. https://bm.kaznu.kz/index.php/kaznu/article/view/222.