@article{MZM_1984_36_4_a7,
     author = {A. M. Astashov},
     title = {A generalization of {Darboux} theorem to {Hamiltonian} field theory},
     journal = {Matemati\v{c}eskie zametki},
     pages = {537--547},
     publisher = {mathdoc},
     volume = {36},
     number = {4},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1984_36_4_a7/}
}