Asymptotics of a generalized solution of linear singularly perturbed systems of higher order differential equations with degenerations in the case of multiple spectrum of boundary coupling of matrices. НК [Internet]. 2014 Sep. 29 [cited 2026 Jan. 21];17(3):379-98. Available from: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/751