@article{VMUMM_2023_4_a1,
     author = {I. N. Sergeev},
     title = {Classes of linear approximations providing various types of stability or instability of differential systems},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {8--15},
     publisher = {mathdoc},
     number = {4},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2023_4_a1/}
}