@article{SM_2000_191_2_a1,
     author = {N. V. Denisova and V. V. Kozlov},
     title = {Polynomial integrals of reversible mechanical systems with a~two-dimensional torus as the~configuration space},
     journal = {Sbornik. Mathematics},
     pages = {189--208},
     publisher = {mathdoc},
     volume = {191},
     number = {2},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2000_191_2_a1/}
}