@article{IIGUM_2012_5_1_a5,
     author = {A. A. Kosov and A. V. Sinitsyn},
     title = {Construction of the first integrals for a special class of nonlinear systems},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {57--69},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2012_5_1_a5/}
}