Nurseyitova, A. T., D. B. Nurseyitov, and G. A. Tylepberdinova. “Numerical Solution of One-Dimensional Inverse Acoustics Problem by Landweber Iteration Method”. Journal of Mathematics, Mechanics and Computer Science, vol. 65, no. 2, June 2010, pp. 79-86, https://bm.kaznu.kz/index.php/kaznu/article/view/238.