@article{SM_2008_199_3_a4,
     author = {A. Yu. Moskvin},
     title = {Topology of the {Liouville} foliation on a~2-sphere in the {Dullin-Matveev} integrable case},
     journal = {Sbornik. Mathematics},
     pages = {411--448},
     publisher = {mathdoc},
     volume = {199},
     number = {3},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2008_199_3_a4/}
}