About asymptotic integration of singularly perturbed system of linear differential equations with deviating arguments. Neliniini Kolyvannya, [S. l.], v. 13, n. 2, p. 161–176, 2010. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/558. Acesso em: 22 jan. 2026.