@article{DE_1971_7_4_a6,
     author = {V. R. Nosov},
     title = {Periodic solutions of systems of linear equations of general form with deviating argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {639--650},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_4_a6/}
}