@article{TMF_2013_177_3_a3,
     author = {Yu. A. Grigor'ev and V. A. Khudobakhshov and A. V. Tsiganov},
     title = {Separation of variables for some systems with a~fourth-order integral of motion},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {468--481},
     publisher = {mathdoc},
     volume = {177},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2013_177_3_a3/}
}