HUKA, D.B.; MELESSE, W.G.; GELU, F.W. Numerical solution of singularly perturbed parabolic differential difference equations. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 119, n. 3, p. 107–124, 2025. DOI: 10.31489/2025m3/107-124. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/1107. Acesso em: 5 oct. 2025.