@article{DE_1983_19_10_a17,
     author = {A. V. Knyazev and V. I. Skalyga},
     title = {Matrices of rational differential operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1793--1795},
     publisher = {mathdoc},
     volume = {19},
     number = {10},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_10_a17/}
}