@article{DE_1993_29_4_a14,
     author = {V. P. Derevenskii},
     title = {Higher order matrix linear differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {711--714},
     publisher = {mathdoc},
     volume = {29},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1993_29_4_a14/}
}