@article{DAN_1996_351_4_a9,
     author = {A. G. Kotousov and N. A. Mahutov},
     title = {Conservation laws and invariant integrals in the theory of},
     journal = {Doklady Akademii Nauk},
     pages = {476--478},
     year = {1996},
     volume = {351},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_351_4_a9/}
}