A Comparative Study of Matched Asymptotic Expansion and Homotopy Perturbation Method for the Reaction-Convection-Diffusion Boundary Value Problem with Mathematica-Based Validation. IJPACM [Internet]. 2026 Jun. 30 [cited 2026 Sep. 10];1(1):136-50. Available from: https://ijpacm.nobleinkresearch.com/1/article/view/1