Kanguzhin, B. E., G. Dairbayeva, and Zh. Madibaiuly. “Identification of Boundary Conditions of a Differential Operator”. Journal of Mathematics, Mechanics and Computer Science 103, no. 3 (October 28, 2019): 13–18. Accessed November 23, 2024. https://bm.kaznu.kz/index.php/kaznu/article/view/658.