Zhu, Zhenwei, and Junjie Chen. “Retraction: [Numerical Solution to Unsteady One-Dimensional Convection-Diffusion Problems Using Compact Difference Schemes Combined With Runge-Kutta Methods]”. Contemporary Mathematics 2, no. 4 (November 18, 2021): 399–408. Accessed May 5, 2024. https://ojs.wiserpub.com/index.php/CM/article/view/1167.