@article{MO_2018_1_a5,
     author = {V. V. Ivlev and E. A. Krivoshey},
     title = {Systems of ordinary linear differential equations},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {47--51},
     year = {2018},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2018_1_a5/}
}