@article{DE_1979_15_8_a15,
     author = {A. M. Samoilenko and O. D. Nurzhanov},
     title = {The {Bubnov{\textendash}Galerkin} method for construction of periodic solutions of a {Volterra} type integro-differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1503--1517},
     year = {1979},
     volume = {15},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_8_a15/}
}