@article{DE_1982_18_11_a18,
     author = {Yu. N. Bibikov},
     title = {Quasiperiodic solutions of two-dimensional periodic systems of differential equations of neutral type depending on a small parameter},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1980--1982},
     publisher = {mathdoc},
     volume = {18},
     number = {11},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1982_18_11_a18/}
}