“Mixed Galerkin- Implicit Differences Methods for Solving Coupled Parabolic Boundary Value Problems With Variable Coefficients”. Iraqi Journal of Science 65, no. 5 (May 30, 2024): 2693–2702. Accessed July 27, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/9810.