@article{DE_1988_24_9_a1,
     author = {A. M. Zverkin},
     title = {On the theory of differential-difference equations with delay that is commensurable with the period of the coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1481--1492},
     publisher = {mathdoc},
     volume = {24},
     number = {9},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_9_a1/}
}