Essam R. El-Zahar, Ghaliah F. Al-Boqami and Haifa S. Al-Juaydi. An Efficient Algorithm for Piecewise Approximate Analytical Solutions of High-order Reaction-Diffusion Singular Perturbation Problems with Boundary and Interior Layers. MCSRU-V5 [Internet]. 2025 May 23 [cited 2026 Jun. 10];:33-78. Available from: https://stm.bookpi.org/MCSRU-V5/article/view/18265