@article{DE_1972_8_9_a6,
     author = {V. K. Dubolar'},
     title = {Dynamical systems with aftereffect},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1587--1597},
     year = {1972},
     volume = {8},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_9_a6/}
}