@article{DE_1995_31_4_a8,
     author = {M. G. Shmul'yan},
     title = {On oscillatory solutions of a second-order linear differential equation with retarded argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {622--629},
     publisher = {mathdoc},
     volume = {31},
     number = {4},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1995_31_4_a8/}
}