@article{ND_2007_3_3_a3,
     author = {M. P. Kharlamov},
     title = {Critical subsystems of the {Kowalevski} gyrostat in two constant fields},
     journal = {Russian journal of nonlinear dynamics},
     pages = {331--348},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2007_3_3_a3/}
}