@article{DAN_1989_306_1_a6,
     author = {S. A. Kaschenko},
     title = {Complex periodic solutions of a system of differential-difference},
     journal = {Doklady Akademii Nauk},
     pages = {35--38},
     publisher = {mathdoc},
     volume = {306},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_306_1_a6/}
}