@article{DE_1965_1_12_a4,
     author = {N. V. Medvedev},
     title = {On bounded solutions of a system of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1592--1596},
     year = {1965},
     volume = {1},
     number = {12},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1965_1_12_a4/}
}