@article{SM_2013_204_6_a2,
     author = {A. Yu. Kolesov and N. Kh. Rozov},
     title = {Invariant tori for a~class of nonlinear evolution equations},
     journal = {Sbornik. Mathematics},
     pages = {824--868},
     year = {2013},
     volume = {204},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2013_204_6_a2/}
}