@article{DE_1989_25_5_a4,
     author = {D. V. Paatashvili},
     title = {Unbounded solutions of second-order linear differential equations with retarded argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {774--780},
     publisher = {mathdoc},
     volume = {25},
     number = {5},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_5_a4/}
}