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. НК [Internet]. 2024 Mar. 29 [cited 2026 Jan. 21];27(1):92-106. Available from: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/1132