@article{DE_1968_4_7_a3,
     author = {A. F. Kleimenov and S. N. Shimanov},
     title = {On the question of the existence and the construction of periodic solutions of systems with lag which are close to {Ljapunov} systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1199--1211},
     publisher = {mathdoc},
     volume = {4},
     number = {7},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_7_a3/}
}