%0 Journal Article %A O. B. Arushanyan %A S. F. Zaletkin %T On some analytic method for approximate solution of systems of second order ordinary differential equations %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2019 %P 65-69 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2019_3_a9/ %G ru %F VMUMM_2019_3_a9