@article{IVM_1976_1_a16,
     author = {G. O. \`El'sting},
     title = {A~certain invariant subalgebra in the {Hamiltonian} and the contact {Lie} algebra},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {129--131},
     publisher = {mathdoc},
     number = {1},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1976_1_a16/}
}