@article{DE_1966_2_12_a3,
     author = {D. V. Izyumova},
     title = {Conditions for the oscillatory and non-oscillatory nature of non-linear differential equations of second order},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1572--1586},
     publisher = {mathdoc},
     volume = {2},
     number = {12},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1966_2_12_a3/}
}