@article{SM_1988_60_1_a7,
     author = {A. A. Davydov},
     title = {The~normal form of slow motions of an equation of relaxation type and fibrations of binomial surfaces},
     journal = {Sbornik. Mathematics},
     pages = {133--141},
     publisher = {mathdoc},
     volume = {60},
     number = {1},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1988_60_1_a7/}
}