@article{SM_2004_195_3_a3,
     author = {P. V. Morozov},
     title = {Topology of {Liouville} foliations in {the~Steklov} and {the~Sokolov}  integrable cases {of~Kirchhoff's}   equations},
     journal = {Sbornik. Mathematics},
     pages = {369--412},
     publisher = {mathdoc},
     volume = {195},
     number = {3},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2004_195_3_a3/}
}