@article{DE_1977_13_10_a11,
     author = {V. A. Tyshkevich},
     title = {On the solvability of the problem of the accumulation of perturbations for linear differential equations with retarded argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1815--1820},
     publisher = {mathdoc},
     volume = {13},
     number = {10},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_10_a11/}
}