Cordero N, Cronin K, Shishkin G, Shishkina L, Stynes M. Finite difference scheme for a singularly perturbed parabolic equations in the presence of initial and boundary layers. MMA [Internet]. 2008Dec.31 [cited 2024Dec.22];13(4):483-92. Available from: https://jeelm.vgtu.lt/index.php/MMA/article/view/7035