Молдағали, Еркебұлан, and Kordan Ospanov. “CONDITIONS FOR SOLVABILITY AND COERCIVENESS OF A FOURTH-ORDER DIFFERENTIAL EQUATION WITH AN INTERMEDIATE COEFFICIENT”. Journal of Mathematics, Mechanics and Computer Science 125, no. 1 (March 25, 2025). Accessed April 2, 2025. https://bm.kaznu.kz/index.php/kaznu/article/view/1627.