Shishkina, Lida, and Grigory Shishkin. “Robust Numerical Method for a System of Singularly Perturbed Parabolic reaction‐diffusion Equations on a Rectangle”. Mathematical Modelling and Analysis 13, no. 2 (June 30, 2008): 251–261. Accessed February 19, 2026. https://journals.vilniustech.lt/index.php/MMA/article/view/7008.