@article{DE_1973_9_11_a0,
     author = {N. V. Azbelev and Yu. I. Zubko and S. M. Labovski},
     title = {On the question of differential inequalities for equations with retarded argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1931--1936},
     publisher = {mathdoc},
     volume = {9},
     number = {11},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_11_a0/}
}