@article{ND_2007_3_2_a5,
     author = {A. V. Borisov and A. A. Kilin and I. S. Mamaev},
     title = {A new integrable problem of motion of point vortices on the sphere},
     journal = {Russian journal of nonlinear dynamics},
     pages = {211--223},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2007_3_2_a5/}
}