@article{SM_2014_205_3_a5,
     author = {L. V. Lokutsievskii},
     title = {The {Hamiltonian} property of the flow of singular trajectories},
     journal = {Sbornik. Mathematics},
     pages = {432--458},
     publisher = {mathdoc},
     volume = {205},
     number = {3},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2014_205_3_a5/}
}