%0 Journal Article %A V. B. Levenshtam %T Averaging of a normal system of ordinary differential equations of high frequency with a multipoint boundary value problem on a semi-axis %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2024 %P 64-69 %N 3 %U http://geodesic.mathdoc.fr/item/IVM_2024_3_a4/ %G ru %F IVM_2024_3_a4