@article{DE_1971_7_12_a16,
     author = {N. V. Sharkova},
     title = {The solution of integro-differential equations with self-regulating lag},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2259--2264},
     publisher = {mathdoc},
     volume = {7},
     number = {12},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_12_a16/}
}