MIRZAKULOVA, A. E.; DAUYLBAYEV, M. K. Asymptotic estimates of solutions boundary value problem for singularly perturbed integro-differential equations. Journal of Mathematics, Mechanics and Computer Science, [S. l.], v. 76, n. 1, p. 35–42, 2013. Disponível em: https://bm.kaznu.kz/index.php/kaznu/article/view/85. Acesso em: 3 jan. 2025.