“Asymptotics of the Solution of the Two-Point Boundary-Value Problem for a Linear Singularly Perturbed System of Differential Equations in the Case of a Singular Boundary Bundle of Matrices (one-Dimensional case). Part 1”. Neliniini Kolyvannya, vol. 27, no. 1, Mar. 2024, pp. 92-106, https://doi.org/10.3842/nosc.v27i1.1460.