@article{DE_1971_7_11_a10,
     author = {M. S. Saburov},
     title = {The boundedness of the solutions of a second order differential equation with periodic coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2019--2029},
     publisher = {mathdoc},
     volume = {7},
     number = {11},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_11_a10/}
}