@article{DE_1993_29_10_a5,
     author = {V. L. Kulik},
     title = {Linear systems of differential equations that are regular on $\mathbf R$},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1699--1704},
     publisher = {mathdoc},
     volume = {29},
     number = {10},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1993_29_10_a5/}
}