@article{DE_1982_18_6_a21,
     author = {N. P. Kovalevskiǐ},
     title = {Solutions of a class of integro-differential equations with deviating argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1080--1082},
     publisher = {mathdoc},
     volume = {18},
     number = {6},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1982_18_6_a21/}
}