Zlotnik, Alexander, and Olga Kireeva. “Practical Error Analysis for the Three-Level Bilinear FEM and Finite-Difference Scheme for the 1D Wave Equation With Non-Smooth Data”. Mathematical Modelling and Analysis 23, no. 3 (June 14, 2018): 359-378. Accessed November 25, 2024. https://jau.vgtu.lt/index.php/MMA/article/view/2807.