@article{10_2307_121090,
     author = {V. Jurdjevic},
     title = {Integrable {Hamiltonian} systems on {Lie} groups: {Kowalewski} type},
     journal = {Annals of mathematics},
     year = {1999},
     volume = {150},
     number = {2},
     doi = {10.2307/121090},
     zbl = {0953.37012},
     url = {http://geodesic.mathdoc.fr/articles/10.2307/121090/}
}