@article{SM_2002_193_1_a3,
     author = {A. Yu. Kolesov and N. Kh. Rozov},
     title = {Impact of quadratic non-linearity on the~dynamics},
     journal = {Sbornik. Mathematics},
     pages = {93--118},
     year = {2002},
     volume = {193},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_1_a3/}
}