@article{DE_2004_40_10_a5,
     author = {Yu. N. Smolin},
     title = {Exponential stability of periodic delay differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1333--1341},
     year = {2004},
     volume = {40},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2004_40_10_a5/}
}