@article{VMUMM_2019_3_a9,
     author = {O. B. Arushanyan and S. F. Zaletkin},
     title = {On some analytic method for approximate solution of systems of second order ordinary differential equations},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {65--69},
     publisher = {mathdoc},
     number = {3},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2019_3_a9/}
}