@article{VMUMM_2019_3_a4,
     author = {I. N. Sergeev},
     title = {Reducibility of linear differential systems to linear differential equations},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {39--44},
     publisher = {mathdoc},
     number = {3},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2019_3_a4/}
}