@article{FAA_1978_12_2_a1,
     author = {I. M. Gel'fand and L. A. Dikii},
     title = {The calculus of jets and nonlinear {Hamiltonian} systems},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {8--23},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1978_12_2_a1/}
}