@article{DE_1971_7_2_a2,
     author = {Yu. I. Domshlak},
     title = {The oscillatoriness of the solutions of second order differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {205--214},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_2_a2/}
}