Ivanyuk NN. Construction of asymptotic representations of solutions from the classL?? for systems of differential equations by the method of characteristic matrix functions. Ukr. Mat. Zhurn. [Internet]. 1994Sep.25 [cited 2024Nov.24];46(9):1148–1155. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5631