@article{DAN_1983_270_4_a1,
     author = {B. A. Dubrovin and S. P. Novikov},
     title = {Hamiltonian formalism of one-dimensional systems of hydrodynamic type, and the {Bogolyubov--Whitham}  averaging method},
     journal = {Doklady Akademii Nauk},
     pages = {781--785},
     publisher = {mathdoc},
     volume = {270},
     number = {4},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_270_4_a1/}
}