DAUYLBAYEV, M. K.; UAISSOV, A. B. Asymptotic behavior of the solutions of boundary-value problems for singularly perturbed integro-differential equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 11, p. 1466–1479, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1529. Acesso em: 5 dec. 2025.