@article{VMUMM_1992_2_a12,
     author = {S. L. Dudoladov},
     title = {Normal forms of dynamical systems that admit a first integral},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {62--66},
     publisher = {mathdoc},
     number = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1992_2_a12/}
}