@article{DE_1965_1_9_a5,
     author = {M. P. Mikhailova and V. V. Podgornov},
     title = {On differential inequalities for equations with retarded argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1183--1189},
     publisher = {mathdoc},
     volume = {1},
     number = {9},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1965_1_9_a5/}
}