@article{TM_2016_295_a2,
     author = {I. A. Bizyaev and A. V. Borisov and I. S. Mamaev},
     title = {Generalizations of the {Kovalevskaya} case and quaternions},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {41--52},
     publisher = {mathdoc},
     volume = {295},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2016_295_a2/}
}