@article{IM2_1998_62_2_a2,
     author = {V. V. Kalashnikov},
     title = {Typical integrable {Hamiltonian} systems on a~four-dimensional symplectic manifold},
     journal = {Izvestiya. Mathematics},
     pages = {261--285},
     year = {1998},
     volume = {62},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1998_62_2_a2/}
}