@article{SM_1995_186_1_a0,
     author = {A. V. Bolsinov},
     title = {A smooth trajectory classification of integrable {Hamiltonian} systems with two degrees of freedom},
     journal = {Sbornik. Mathematics},
     pages = {1--27},
     publisher = {mathdoc},
     volume = {186},
     number = {1},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_186_1_a0/}
}