@article{ND_2009_5_4_a0,
     author = {A. V. Borisov and A. A. Kilin and I. S. Mamaev},
     title = {New superintegrable system on a sphere},
     journal = {Russian journal of nonlinear dynamics},
     pages = {455--462},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2009_5_4_a0/}
}