“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”. 2024. Neliniini Kolyvannya 27 (1): 92-106. https://doi.org/10.3842/nosc.v27i1.1460.