@article{DE_1980_16_11_a5,
     author = {R. G. Koplatadze},
     title = {Asymptotic behavior of the solutions of second-order linear differential equations with retarded argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1963--1966},
     publisher = {mathdoc},
     volume = {16},
     number = {11},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_11_a5/}
}