@article{DE_1990_26_9_a2,
     author = {L. M. Berezanskii},
     title = {Positivity of the {Cauchy} function and stability of linear differential equations with aftereffect},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1490--1500},
     publisher = {mathdoc},
     volume = {26},
     number = {9},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_9_a2/}
}