Repetylo SM, Hlynsky YM. REGULARIZATION OF THE BOUNDARY–VALUE PROBLEM WITH MIXED CONDITIONS FOR A SECOND ORDER HYPERBOLIC EQUATION. Number [Internet]. 2021 Oct. 22 [cited 2024 Apr. 27];(16(60):11-9. Available from: https://pvntsh.nung.edu.ua/index.php/number/article/view/1705