@article{ND_2007_3_1_a2,
     author = {A. V. Borisov and I. S. Mamaev},
     title = {On isomorphisms of some integrable systems on a plane and a sphere},
     journal = {Russian journal of nonlinear dynamics},
     pages = {49--56},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2007_3_1_a2/}
}