The Cauchy Problem for the Degenerate Singularly Perturbed Linear System in Case of the Multiple Spectrum of the Limit Bundle of Matrixes. Neliniini Kolyvannya, [S. l.], v. 4, n. 2, p. 226–233, 2001. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/166. Acesso em: 22 jan. 2026.