@article{SM_2009_200_6_a4,
     author = {G. Haghighatdoost and A. A. Oshemkov},
     title = {The topology of {Liouville} foliation for the {Sokolov} integrable case on the {Lie} algebra so(4)},
     journal = {Sbornik. Mathematics},
     pages = {899--921},
     publisher = {mathdoc},
     volume = {200},
     number = {6},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2009_200_6_a4/}
}