“The Cauchy Problem for the Degenerate Singularly Perturbed Linear System in Case of the Multiple Spectrum of the Limit Bundle of Matrixes” (2001) Neliniini Kolyvannya, 4(2), pp. 226–233. Available at: https://nosc.imath.kiev.ua/index.php/nosc/article/view/166 (Accessed: 12 April 2026).