@article{DE_1983_19_5_a4,
     author = {F. Neiman},
     title = {The theory of global properties of $n$th-order ordinary linear differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {799--808},
     publisher = {mathdoc},
     volume = {19},
     number = {5},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_5_a4/}
}