On asymptotics construction for a multipoint boundary-value problem for a linear degenerate singularly perturbed differential system. Neliniini Kolyvannya, [S. l.], v. 18, n. 2, p. 164–175, 2015. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/778. Acesso em: 21 jan. 2026.